From 6d419dcc1d97868b1054abf4c81972e960cceba7 Mon Sep 17 00:00:00 2001
From: Edward Njoroge <codingedward@gmail.com>
Date: Sat, 2 May 2020 02:11:43 +0300
Subject: [PATCH] Fix nullable fields and update dependancies (#8)

---
 Pipfile.lock                   | 582 +++++++++++++++++++--------------
 flask_sieve/rules_processor.py |  19 +-
 requirements.txt               |  59 ++--
 tests/test_rules_processor.py  |  11 +
 4 files changed, 392 insertions(+), 279 deletions(-)

diff --git a/Pipfile.lock b/Pipfile.lock
index 994f97b..5ad1959 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -25,17 +25,17 @@
         },
         "babel": {
             "hashes": [
-                "sha256:af92e6106cb7c55286b25b38ad7695f8b4efb36a90ba483d7f7a6628c46158ab",
-                "sha256:e86135ae101e31e2c8ec20a4e0c5220f4eed12487d5cf3f78be7e98d3a57fc28"
+                "sha256:1aac2ae2d0d8ea368fa90906567f5c08463d98ade155c0c4bfedd6a0f7160e38",
+                "sha256:d670ea0b10f8b723672d3a6abeb87b565b244da220d76b4dba1b66269ec152d4"
             ],
-            "version": "==2.7.0"
+            "version": "==2.8.0"
         },
         "certifi": {
             "hashes": [
-                "sha256:e4f3620cfea4f83eedc95b24abd9cd56f3c4b146dd0177e83a21b4eb49e21e50",
-                "sha256:fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef"
+                "sha256:017c25db2a153ce562900032d5bc68e9f191e44e9a0f762f373977de9df1fbb3",
+                "sha256:25b64c7da4cd7479594d035c08c2d809eb4aab3a26e5a990ea98cc450c320f1f"
             ],
-            "version": "==2019.9.11"
+            "version": "==2019.11.28"
         },
         "chardet": {
             "hashes": [
@@ -46,10 +46,10 @@
         },
         "click": {
             "hashes": [
-                "sha256:2335065e6395b9e67ca716de5f7526736bfa6ceead690adf616d925bdc622b13",
-                "sha256:5b94b49521f6456670fdb30cd82a4eca9412788a93fa6dd6df72c94d5a8ff2d7"
+                "sha256:8a18b4ea89d8820c5d0c7da8a64b2c324b4dabb695804dbfea19b9be9d88c0cc",
+                "sha256:e345d143d80bf5ee7534056164e5e112ea5e22716bbb1ce727941f4c8b471b9a"
             ],
-            "version": "==7.0"
+            "version": "==7.1.1"
         },
         "commonmark": {
             "hashes": [
@@ -60,11 +60,10 @@
         },
         "docutils": {
             "hashes": [
-                "sha256:6c4f696463b79f1fb8ba0c594b63840ebd41f059e92b31957c46b74a4599b6d0",
-                "sha256:9e4d7ecfc600058e07ba661411a2b7de2fd0fafa17d1a7f7361cd47b1175c827",
-                "sha256:a2aeea129088da402665e92e0b25b04b073c04b2dce4ab65caaa38b7ce2e1a99"
+                "sha256:0c5b78adfbf7762415433f5515cd5c9e762339e23369dbe8000d84a4bf4ab3af",
+                "sha256:c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc"
             ],
-            "version": "==0.15.2"
+            "version": "==0.16"
         },
         "flask": {
             "hashes": [
@@ -74,19 +73,26 @@
             "index": "pypi",
             "version": "==1.1.1"
         },
+        "future": {
+            "hashes": [
+                "sha256:b1bead90b70cf6ec3f0710ae53a525360fa360d306a86583adc6bf83a4db537d"
+            ],
+            "markers": "python_version < '3'",
+            "version": "==0.18.2"
+        },
         "idna": {
             "hashes": [
-                "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
-                "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"
+                "sha256:7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb",
+                "sha256:a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"
             ],
-            "version": "==2.8"
+            "version": "==2.9"
         },
         "imagesize": {
             "hashes": [
-                "sha256:3f349de3eb99145973fefb7dbe38554414e5c30abd0c8e4b970a7c9d09f3a1d8",
-                "sha256:f3832918bc3c66617f92e35f5d70729187676313caa60c187eb0f28b8fe5e3b5"
+                "sha256:6965f19a6a2039c7d48bca7dba2473069ff854c36ae6f19d2cde309d998228a1",
+                "sha256:b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"
             ],
-            "version": "==1.1.0"
+            "version": "==1.2.0"
         },
         "itsdangerous": {
             "hashes": [
@@ -97,10 +103,10 @@
         },
         "jinja2": {
             "hashes": [
-                "sha256:74320bb91f31270f9551d46522e33af46a80c3d619f4a4bf42b3164d30b5911f",
-                "sha256:9fe95f19286cfefaa917656583d020be14e7859c6b0252588391e47db34527de"
+                "sha256:93187ffbc7808079673ef52771baa950426fd664d3aad1d0fa3e95644360e250",
+                "sha256:b0eaf100007721b5c16c1fc1eecb87409464edc10469ddc9a22a27a99123be49"
             ],
-            "version": "==2.10.3"
+            "version": "==2.11.1"
         },
         "markupsafe": {
             "hashes": [
@@ -108,13 +114,16 @@
                 "sha256:09027a7803a62ca78792ad89403b1b7a73a01c8cb65909cd876f7fcebd79b161",
                 "sha256:09c4b7f37d6c648cb13f9230d847adf22f8171b1ccc4d5682398e77f40309235",
                 "sha256:1027c282dad077d0bae18be6794e6b6b8c91d58ed8a8d89a89d59693b9131db5",
+                "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42",
                 "sha256:24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff",
                 "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b",
                 "sha256:43a55c2930bbc139570ac2452adf3d70cdbb3cfe5912c71cdce1c2c6bbd9c5d1",
                 "sha256:46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e",
                 "sha256:500d4957e52ddc3351cabf489e79c91c17f6e0899158447047588650b5e69183",
                 "sha256:535f6fc4d397c1563d08b88e485c3496cf5784e927af890fb3c3aac7f933ec66",
+                "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b",
                 "sha256:62fe6c95e3ec8a7fad637b7f3d372c15ec1caa01ab47926cfdf7a75b40e0eac1",
+                "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15",
                 "sha256:6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1",
                 "sha256:717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e",
                 "sha256:79855e1c5b8da654cf486b830bd42c06e8780cea587384cf6545b7d9ac013a0b",
@@ -131,74 +140,76 @@
                 "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6",
                 "sha256:c8716a48d94b06bb3b2524c2b77e055fb313aeb4ea620c8dd03a105574ba704f",
                 "sha256:cd5df75523866410809ca100dc9681e301e3c27567cf498077e8551b6d20e42f",
-                "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7"
+                "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2",
+                "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7",
+                "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"
             ],
             "version": "==1.1.1"
         },
         "packaging": {
             "hashes": [
-                "sha256:28b924174df7a2fa32c1953825ff29c61e2f5e082343165438812f00d3a7fc47",
-                "sha256:d9551545c6d761f3def1677baf08ab2a3ca17c56879e70fecba2fc4dde4ed108"
+                "sha256:3c292b474fda1671ec57d46d739d072bfd495a4f51ad01a055121d81e952b7a3",
+                "sha256:82f77b9bee21c1bafbf35a84905d604d5d1223801d639cf3ed140bd651c08752"
             ],
-            "version": "==19.2"
+            "version": "==20.3"
         },
         "pillow": {
             "hashes": [
-                "sha256:047d9473cf68af50ac85f8ee5d5f21a60f849bc17d348da7fc85711287a75031",
-                "sha256:0f66dc6c8a3cc319561a633b6aa82c44107f12594643efa37210d8c924fc1c71",
-                "sha256:12c9169c4e8fe0a7329e8658c7e488001f6b4c8e88740e76292c2b857af2e94c",
-                "sha256:248cffc168896982f125f5c13e9317c059f74fffdb4152893339f3be62a01340",
-                "sha256:27faf0552bf8c260a5cee21a76e031acaea68babb64daf7e8f2e2540745082aa",
-                "sha256:285edafad9bc60d96978ed24d77cdc0b91dace88e5da8c548ba5937c425bca8b",
-                "sha256:384b12c9aa8ef95558abdcb50aada56d74bc7cc131dd62d28c2d0e4d3aadd573",
-                "sha256:38950b3a707f6cef09cd3cbb142474357ad1a985ceb44d921bdf7b4647b3e13e",
-                "sha256:4aad1b88933fd6dc2846552b89ad0c74ddbba2f0884e2c162aa368374bf5abab",
-                "sha256:4ac6148008c169603070c092e81f88738f1a0c511e07bd2bb0f9ef542d375da9",
-                "sha256:4deb1d2a45861ae6f0b12ea0a786a03d19d29edcc7e05775b85ec2877cb54c5e",
-                "sha256:59aa2c124df72cc75ed72c8d6005c442d4685691a30c55321e00ed915ad1a291",
-                "sha256:5a47d2123a9ec86660fe0e8d0ebf0aa6bc6a17edc63f338b73ea20ba11713f12",
-                "sha256:5cc901c2ab9409b4b7ac7b5bcc3e86ac14548627062463da0af3b6b7c555a871",
-                "sha256:6c1db03e8dff7b9f955a0fb9907eb9ca5da75b5ce056c0c93d33100a35050281",
-                "sha256:7ce80c0a65a6ea90ef9c1f63c8593fcd2929448613fc8da0adf3e6bfad669d08",
-                "sha256:809c19241c14433c5d6135e1b6c72da4e3b56d5c865ad5736ab99af8896b8f41",
-                "sha256:83792cb4e0b5af480588601467c0764242b9a483caea71ef12d22a0d0d6bdce2",
-                "sha256:846fa202bd7ee0f6215c897a1d33238ef071b50766339186687bd9b7a6d26ac5",
-                "sha256:9f5529fc02009f96ba95bea48870173426879dc19eec49ca8e08cd63ecd82ddb",
-                "sha256:a423c2ea001c6265ed28700df056f75e26215fd28c001e93ef4380b0f05f9547",
-                "sha256:ac4428094b42907aba5879c7c000d01c8278d451a3b7cccd2103e21f6397ea75",
-                "sha256:b1ae48d87f10d1384e5beecd169c77502fcc04a2c00a4c02b85f0a94b419e5f9",
-                "sha256:bf4e972a88f8841d8fdc6db1a75e0f8d763e66e3754b03006cbc3854d89f1cb1",
-                "sha256:c6414f6aad598364aaf81068cabb077894eb88fed99c6a65e6e8217bab62ae7a",
-                "sha256:c710fcb7ee32f67baf25aa9ffede4795fd5d93b163ce95fdc724383e38c9df96",
-                "sha256:c7be4b8a09852291c3c48d3c25d1b876d2494a0a674980089ac9d5e0d78bd132",
-                "sha256:c9e5ffb910b14f090ac9c38599063e354887a5f6d7e6d26795e916b4514f2c1a",
-                "sha256:e0697b826da6c2472bb6488db4c0a7fa8af0d52fa08833ceb3681358914b14e5",
-                "sha256:e9a3edd5f714229d41057d56ac0f39ad9bdba6767e8c888c951869f0bdd129b0"
+                "sha256:00e0bbe9923adc5cc38a8da7d87d4ce16cde53b8d3bba8886cb928e84522d963",
+                "sha256:03457e439d073770d88afdd90318382084732a5b98b0eb6f49454746dbaae701",
+                "sha256:0d5c99f80068f13231ac206bd9b2e80ea357f5cf9ae0fa97fab21e32d5b61065",
+                "sha256:1a3bc8e1db5af40a81535a62a591fafdb30a8a1b319798ea8052aa65ef8f06d2",
+                "sha256:2b4a94be53dff02af90760c10a2e3634c3c7703410f38c98154d5ce71fe63d20",
+                "sha256:3ba7d8f1d962780f86aa747fef0baf3211b80cb13310fff0c375da879c0656d4",
+                "sha256:3e81485cec47c24f5fb27acb485a4fc97376b2b332ed633867dc68ac3077998c",
+                "sha256:43ef1cff7ee57f9c8c8e6fa02a62eae9fa23a7e34418c7ce88c0e3fe09d1fb38",
+                "sha256:4adc3302df4faf77c63ab3a83e1a3e34b94a6a992084f4aa1cb236d1deaf4b39",
+                "sha256:535e8e0e02c9f1fc2e307256149d6ee8ad3aa9a6e24144b7b6e6fb6126cb0e99",
+                "sha256:5ccfcb0a34ad9b77ad247c231edb781763198f405a5c8dc1b642449af821fb7f",
+                "sha256:5dcbbaa3a24d091a64560d3c439a8962866a79a033d40eb1a75f1b3413bfc2bc",
+                "sha256:6e2a7e74d1a626b817ecb7a28c433b471a395c010b2a1f511f976e9ea4363e64",
+                "sha256:82859575005408af81b3e9171ae326ff56a69af5439d3fc20e8cb76cd51c8246",
+                "sha256:834dd023b7f987d6b700ad93dc818098d7eb046bd445e9992b3093c6f9d7a95f",
+                "sha256:87ef0eca169f7f0bc050b22f05c7e174a65c36d584428431e802c0165c5856ea",
+                "sha256:900de1fdc93764be13f6b39dc0dd0207d9ff441d87ad7c6e97e49b81987dc0f3",
+                "sha256:92b83b380f9181cacc994f4c983d95a9c8b00b50bf786c66d235716b526a3332",
+                "sha256:aa1b0297e352007ec781a33f026afbb062a9a9895bb103c8f49af434b1666880",
+                "sha256:aa4792ab056f51b49e7d59ce5733155e10a918baf8ce50f64405db23d5627fa2",
+                "sha256:b72c39585f1837d946bd1a829a4820ccf86e361f28cbf60f5d646f06318b61e2",
+                "sha256:bb7861e4618a0c06c40a2e509c1bea207eea5fd4320d486e314e00745a402ca5",
+                "sha256:bc149dab804291a18e1186536519e5e122a2ac1316cb80f506e855a500b1cdd4",
+                "sha256:c424d35a5259be559b64490d0fd9e03fba81f1ce8e5b66e0a59de97547351d80",
+                "sha256:cbd5647097dc55e501f459dbac7f1d0402225636deeb9e0a98a8d2df649fc19d",
+                "sha256:ccf16fe444cc43800eeacd4f4769971200982200a71b1368f49410d0eb769543",
+                "sha256:d3a98444a00b4643b22b0685dbf9e0ddcaf4ebfd4ea23f84f228adf5a0765bb2",
+                "sha256:d6b4dc325170bee04ca8292bbd556c6f5398d52c6149ca881e67daf62215426f",
+                "sha256:db9ff0c251ed066d367f53b64827cc9e18ccea001b986d08c265e53625dab950",
+                "sha256:e3a797a079ce289e59dbd7eac9ca3bf682d52687f718686857281475b7ca8e6a"
             ],
             "index": "pypi",
-            "version": "==6.2.1"
+            "version": "==6.2.2"
         },
         "pygments": {
             "hashes": [
-                "sha256:71e430bc85c88a430f000ac1d9b331d2407f681d6f6aec95e8bcfbc3df5b0127",
-                "sha256:881c4c157e45f30af185c1ffe8d549d48ac9127433f2c380c24b84572ad66297"
+                "sha256:2a3fe295e54a20164a9df49c75fa58526d3be48e14aceba6d6b1e8ac0bfd6f1b",
+                "sha256:98c8aa5a9f778fcd1026a17361ddaf7330d1b7c62ae97c3bb0ae73e0b9b6b0fe"
             ],
-            "version": "==2.4.2"
+            "version": "==2.5.2"
         },
         "pyparsing": {
             "hashes": [
-                "sha256:6f98a7b9397e206d78cc01df10131398f1c8b8510a2f4d97d9abd82e1aacdd80",
-                "sha256:d9338df12903bbf5d65a0e4e87c2161968b10d2e489652bb47001d82a9b028b4"
+                "sha256:4c830582a84fb022400b85429791bc551f1f4871c33f23e44f353119e92f969f",
+                "sha256:c342dccb5250c08d45fd6f8b4a559613ca603b57498511740e65cd11a2e7dcec"
             ],
-            "version": "==2.4.2"
+            "version": "==2.4.6"
         },
         "python-dateutil": {
             "hashes": [
-                "sha256:7e6584c74aeed623791615e26efd690f29817a27c73085b78e4bad02493df2fb",
-                "sha256:c89805f6f4d64db21ed966fda138f8a5ed7a4fdbc1a8ee329ce1b74e3c74da9e"
+                "sha256:73ebfe9dbf22e832286dafa60473e4cd239f8592f699aa5adaf10050e6e1823c",
+                "sha256:75bb3f31ea686f1197762692a9ee6a7550b59fc6ca3a1f4b5d7e32fb98e2da2a"
             ],
             "index": "pypi",
-            "version": "==2.8.0"
+            "version": "==2.8.1"
         },
         "pytz": {
             "hashes": [
@@ -218,18 +229,18 @@
         },
         "requests": {
             "hashes": [
-                "sha256:11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4",
-                "sha256:9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31"
+                "sha256:43999036bfa82904b6af1d99e4882b560e5e2c68e5c4b0aa03b655f3d7d73fee",
+                "sha256:b3f43d496c6daba4493e7c431722aeb7dbc6288f52a6e04e7b6023b0247817e6"
             ],
             "index": "pypi",
-            "version": "==2.22.0"
+            "version": "==2.23.0"
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
+                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
             ],
-            "version": "==1.12.0"
+            "version": "==1.14.0"
         },
         "snowballstemmer": {
             "hashes": [
@@ -240,68 +251,42 @@
         },
         "sphinx": {
             "hashes": [
-                "sha256:31088dfb95359384b1005619827eaee3056243798c62724fd3fa4b84ee4d71bd",
-                "sha256:52286a0b9d7caa31efee301ec4300dbdab23c3b05da1c9024b4e84896fb73d79"
-            ],
-            "version": "==2.2.1"
-        },
-        "sphinxcontrib-applehelp": {
-            "hashes": [
-                "sha256:edaa0ab2b2bc74403149cb0209d6775c96de797dfd5b5e2a71981309efab3897",
-                "sha256:fb8dee85af95e5c30c91f10e7eb3c8967308518e0f7488a2828ef7bc191d0d5d"
-            ],
-            "version": "==1.0.1"
-        },
-        "sphinxcontrib-devhelp": {
-            "hashes": [
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@@ -314,17 +299,50 @@
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@@ -333,50 +351,91 @@
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+                "sha256:df6b4dca2e11865e6cfbfb708e800efb18370f5a46fd601d3755bc7f85b3a8a2",
+                "sha256:ecadccc7ba52193963c0475ac9f6fa28ac01e01349a2ca48509667ef41ffd2cf",
+                "sha256:fb81c17e0ebe3358486cd8cc3ad78adbae58af12fc2bf2bc0bb84e8090fa5ce8"
+            ],
+            "version": "==2.8"
         },
         "docopt": {
             "hashes": [
@@ -386,39 +445,55 @@
         },
         "docutils": {
             "hashes": [
-                "sha256:6c4f696463b79f1fb8ba0c594b63840ebd41f059e92b31957c46b74a4599b6d0",
-                "sha256:9e4d7ecfc600058e07ba661411a2b7de2fd0fafa17d1a7f7361cd47b1175c827",
-                "sha256:a2aeea129088da402665e92e0b25b04b073c04b2dce4ab65caaa38b7ce2e1a99"
+                "sha256:0c5b78adfbf7762415433f5515cd5c9e762339e23369dbe8000d84a4bf4ab3af",
+                "sha256:c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc"
+            ],
+            "version": "==0.16"
+        },
+        "enum34": {
+            "hashes": [
+                "sha256:a98a201d6de3f2ab3db284e70a33b0f896fbf35f8086594e8c9e74b909058d53",
+                "sha256:c3858660960c984d6ab0ebad691265180da2b43f07e061c0f8dca9ef3cffd328",
+                "sha256:cce6a7477ed816bd2542d03d53db9f0db935dd013b70f336a95c73979289f248"
             ],
-            "version": "==0.15.2"
+            "markers": "python_version < '3'",
+            "version": "==1.1.10"
         },
         "idna": {
             "hashes": [
-                "sha256:c357b3f628cf53ae2c4c05627ecc484553142ca23264e593d327bcde5e9c3407",
-                "sha256:ea8b7f6188e6fa117537c3df7da9fc686d485087abf6ac197f9c46432f7e4a3c"
+                "sha256:7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb",
+                "sha256:a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"
             ],
-            "version": "==2.8"
+            "version": "==2.9"
         },
         "imagesize": {
             "hashes": [
-                "sha256:3f349de3eb99145973fefb7dbe38554414e5c30abd0c8e4b970a7c9d09f3a1d8",
-                "sha256:f3832918bc3c66617f92e35f5d70729187676313caa60c187eb0f28b8fe5e3b5"
+                "sha256:6965f19a6a2039c7d48bca7dba2473069ff854c36ae6f19d2cde309d998228a1",
+                "sha256:b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"
             ],
-            "version": "==1.1.0"
+            "version": "==1.2.0"
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:aa18d7378b00b40847790e7c27e11673d7fed219354109d0e7b9e5b25dc3ad26",
-                "sha256:d5f18a79777f3aa179c145737780282e27b508fc8fd688cb17c7a813e8bd39af"
+                "sha256:2a688cbaa90e0cc587f1df48bdc97a6eadccdcd9c35fb3f976a09e3b5016d90f",
+                "sha256:34513a8a0c4962bc66d35b359558fd8a5e10cd472d37aec5f66858addef32c1e"
+            ],
+            "markers": "python_version < '3.8'",
+            "version": "==1.6.0"
+        },
+        "ipaddress": {
+            "hashes": [
+                "sha256:6e0f4a39e66cb5bb9a137b00276a2eff74f93b71dcbdad6f10ff7df9d3557fcc",
+                "sha256:b7f8e0369580bb4a24d5ba1d7cc29660a4a6987763faf1d8a8046830e020e7e2"
             ],
-            "version": "==0.23"
+            "version": "==1.0.23"
         },
         "jinja2": {
             "hashes": [
-                "sha256:74320bb91f31270f9551d46522e33af46a80c3d619f4a4bf42b3164d30b5911f",
-                "sha256:9fe95f19286cfefaa917656583d020be14e7859c6b0252588391e47db34527de"
+                "sha256:93187ffbc7808079673ef52771baa950426fd664d3aad1d0fa3e95644360e250",
+                "sha256:b0eaf100007721b5c16c1fc1eecb87409464edc10469ddc9a22a27a99123be49"
             ],
-            "version": "==2.10.3"
+            "version": "==2.11.1"
         },
         "markupsafe": {
             "hashes": [
@@ -426,13 +501,16 @@
                 "sha256:09027a7803a62ca78792ad89403b1b7a73a01c8cb65909cd876f7fcebd79b161",
                 "sha256:09c4b7f37d6c648cb13f9230d847adf22f8171b1ccc4d5682398e77f40309235",
                 "sha256:1027c282dad077d0bae18be6794e6b6b8c91d58ed8a8d89a89d59693b9131db5",
+                "sha256:13d3144e1e340870b25e7b10b98d779608c02016d5184cfb9927a9f10c689f42",
                 "sha256:24982cc2533820871eba85ba648cd53d8623687ff11cbb805be4ff7b4c971aff",
                 "sha256:29872e92839765e546828bb7754a68c418d927cd064fd4708fab9fe9c8bb116b",
                 "sha256:43a55c2930bbc139570ac2452adf3d70cdbb3cfe5912c71cdce1c2c6bbd9c5d1",
                 "sha256:46c99d2de99945ec5cb54f23c8cd5689f6d7177305ebff350a58ce5f8de1669e",
                 "sha256:500d4957e52ddc3351cabf489e79c91c17f6e0899158447047588650b5e69183",
                 "sha256:535f6fc4d397c1563d08b88e485c3496cf5784e927af890fb3c3aac7f933ec66",
+                "sha256:596510de112c685489095da617b5bcbbac7dd6384aeebeda4df6025d0256a81b",
                 "sha256:62fe6c95e3ec8a7fad637b7f3d372c15ec1caa01ab47926cfdf7a75b40e0eac1",
+                "sha256:6788b695d50a51edb699cb55e35487e430fa21f1ed838122d722e0ff0ac5ba15",
                 "sha256:6dd73240d2af64df90aa7c4e7481e23825ea70af4b4922f8ede5b9e35f78a3b1",
                 "sha256:717ba8fe3ae9cc0006d7c451f0bb265ee07739daf76355d06366154ee68d221e",
                 "sha256:79855e1c5b8da654cf486b830bd42c06e8780cea587384cf6545b7d9ac013a0b",
@@ -449,17 +527,12 @@
                 "sha256:ba59edeaa2fc6114428f1637ffff42da1e311e29382d81b339c1817d37ec93c6",
                 "sha256:c8716a48d94b06bb3b2524c2b77e055fb313aeb4ea620c8dd03a105574ba704f",
                 "sha256:cd5df75523866410809ca100dc9681e301e3c27567cf498077e8551b6d20e42f",
-                "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7"
+                "sha256:cdb132fc825c38e1aeec2c8aa9338310d29d337bebbd7baa06889d09a60a1fa2",
+                "sha256:e249096428b3ae81b08327a63a485ad0878de3fb939049038579ac0ef61e17e7",
+                "sha256:e8313f01ba26fbbe36c7be1966a7b7424942f670f38e666995b88d012765b9be"
             ],
             "version": "==1.1.1"
         },
-        "more-itertools": {
-            "hashes": [
-                "sha256:409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832",
-                "sha256:92b8c4b06dac4f0611c0729b2f2ede52b2e1bac1ab48f089c7ddc12e26bb60c4"
-            ],
-            "version": "==7.2.0"
-        },
         "nose": {
             "hashes": [
                 "sha256:9ff7c6cc443f8c51994b34a667bbcf45afd6d945be7477b52e97516fd17c53ac",
@@ -471,32 +544,54 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:28b924174df7a2fa32c1953825ff29c61e2f5e082343165438812f00d3a7fc47",
-                "sha256:d9551545c6d761f3def1677baf08ab2a3ca17c56879e70fecba2fc4dde4ed108"
+                "sha256:3c292b474fda1671ec57d46d739d072bfd495a4f51ad01a055121d81e952b7a3",
+                "sha256:82f77b9bee21c1bafbf35a84905d604d5d1223801d639cf3ed140bd651c08752"
             ],
-            "version": "==19.2"
+            "version": "==20.3"
         },
         "pallets-sphinx-themes": {
             "hashes": [
-                "sha256:3381a1859f136c8e5f01fc7960be48e9e20c0108b3a86447b9e9451b6e2a95b2",
-                "sha256:bb9afd170e8a3eb26018256c97df5f1b66d3a7d04feb26c14166f1a2e9633012"
+                "sha256:acfcd486b1b705aa25d905b5d42f8d5c38b323ac0669c2bee6cc1f906e9c00ff",
+                "sha256:bbb4fd6e259d498e4e5b4866860f12f0c4e59a67c9ac243eb8c1472cbc730aaf"
             ],
             "index": "pypi",
-            "version": "==1.2.2"
+            "version": "==1.2.3"
+        },
+        "pathlib2": {
+            "hashes": [
+                "sha256:0ec8205a157c80d7acc301c0b18fbd5d44fe655968f5d947b6ecef5290fc35db",
+                "sha256:6cd9a47b597b37cc57de1c05e56fb1a1c9cc9fab04fe78c29acd090418529868"
+            ],
+            "markers": "python_version < '3'",
+            "version": "==2.3.5"
+        },
+        "pycparser": {
+            "hashes": [
+                "sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0",
+                "sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705"
+            ],
+            "version": "==2.20"
         },
         "pygments": {
             "hashes": [
-                "sha256:71e430bc85c88a430f000ac1d9b331d2407f681d6f6aec95e8bcfbc3df5b0127",
-                "sha256:881c4c157e45f30af185c1ffe8d549d48ac9127433f2c380c24b84572ad66297"
+                "sha256:2a3fe295e54a20164a9df49c75fa58526d3be48e14aceba6d6b1e8ac0bfd6f1b",
+                "sha256:98c8aa5a9f778fcd1026a17361ddaf7330d1b7c62ae97c3bb0ae73e0b9b6b0fe"
             ],
-            "version": "==2.4.2"
+            "version": "==2.5.2"
+        },
+        "pyopenssl": {
+            "hashes": [
+                "sha256:621880965a720b8ece2f1b2f54ea2071966ab00e2970ad2ce11d596102063504",
+                "sha256:9a24494b2602aaf402be5c9e30a0b82d4a5c67528fe8fb475e3f3bc00dd69507"
+            ],
+            "version": "==19.1.0"
         },
         "pyparsing": {
             "hashes": [
-                "sha256:6f98a7b9397e206d78cc01df10131398f1c8b8510a2f4d97d9abd82e1aacdd80",
-                "sha256:d9338df12903bbf5d65a0e4e87c2161968b10d2e489652bb47001d82a9b028b4"
+                "sha256:4c830582a84fb022400b85429791bc551f1f4871c33f23e44f353119e92f969f",
+                "sha256:c342dccb5250c08d45fd6f8b4a559613ca603b57498511740e65cd11a2e7dcec"
             ],
-            "version": "==2.4.2"
+            "version": "==2.4.6"
         },
         "pytz": {
             "hashes": [
@@ -508,18 +603,35 @@
         },
         "requests": {
             "hashes": [
-                "sha256:11e007a8a2aa0323f5a921e9e6a2d7e4e67d9877e85773fba9ba6419025cbeb4",
-                "sha256:9cf5292fcd0f598c671cfc1e0d7d1a7f13bb8085e9a590f48c010551dc6c4b31"
+                "sha256:43999036bfa82904b6af1d99e4882b560e5e2c68e5c4b0aa03b655f3d7d73fee",
+                "sha256:b3f43d496c6daba4493e7c431722aeb7dbc6288f52a6e04e7b6023b0247817e6"
             ],
             "index": "pypi",
-            "version": "==2.22.0"
+            "version": "==2.23.0"
+        },
+        "scandir": {
+            "hashes": [
+                "sha256:2586c94e907d99617887daed6c1d102b5ca28f1085f90446554abf1faf73123e",
+                "sha256:2ae41f43797ca0c11591c0c35f2f5875fa99f8797cb1a1fd440497ec0ae4b022",
+                "sha256:2b8e3888b11abb2217a32af0766bc06b65cc4a928d8727828ee68af5a967fa6f",
+                "sha256:2c712840c2e2ee8dfaf36034080108d30060d759c7b73a01a52251cc8989f11f",
+                "sha256:4d4631f6062e658e9007ab3149a9b914f3548cb38bfb021c64f39a025ce578ae",
+                "sha256:67f15b6f83e6507fdc6fca22fedf6ef8b334b399ca27c6b568cbfaa82a364173",
+                "sha256:7d2d7a06a252764061a020407b997dd036f7bd6a175a5ba2b345f0a357f0b3f4",
+                "sha256:8c5922863e44ffc00c5c693190648daa6d15e7c1207ed02d6f46a8dcc2869d32",
+                "sha256:92c85ac42f41ffdc35b6da57ed991575bdbe69db895507af88b9f499b701c188",
+                "sha256:b24086f2375c4a094a6b51e78b4cf7ca16c721dcee2eddd7aa6494b42d6d519d",
+                "sha256:cb925555f43060a1745d0a321cca94bcea927c50114b623d73179189a4e100ac"
+            ],
+            "markers": "python_version < '3.5'",
+            "version": "==1.10.0"
         },
         "six": {
             "hashes": [
-                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
-                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+                "sha256:236bdbdce46e6e6a3d61a337c0f8b763ca1e8717c03b369e87a7ec7ce1319c0a",
+                "sha256:8f3cd2e254d8f793e7f3d6d9df77b92252b52637291d0f0da013c76ea2724b6c"
             ],
-            "version": "==1.12.0"
+            "version": "==1.14.0"
         },
         "snowballstemmer": {
             "hashes": [
@@ -530,67 +642,41 @@
         },
         "sphinx": {
             "hashes": [
-                "sha256:31088dfb95359384b1005619827eaee3056243798c62724fd3fa4b84ee4d71bd",
-                "sha256:52286a0b9d7caa31efee301ec4300dbdab23c3b05da1c9024b4e84896fb73d79"
-            ],
-            "version": "==2.2.1"
-        },
-        "sphinxcontrib-applehelp": {
-            "hashes": [
-                "sha256:edaa0ab2b2bc74403149cb0209d6775c96de797dfd5b5e2a71981309efab3897",
-                "sha256:fb8dee85af95e5c30c91f10e7eb3c8967308518e0f7488a2828ef7bc191d0d5d"
-            ],
-            "version": "==1.0.1"
-        },
-        "sphinxcontrib-devhelp": {
-            "hashes": [
-                "sha256:6c64b077937330a9128a4da74586e8c2130262f014689b4b89e2d08ee7294a34",
-                "sha256:9512ecb00a2b0821a146736b39f7aeb90759834b07e81e8cc23a9c70bacb9981"
+                "sha256:9f3e17c64b34afc653d7c5ec95766e03043cc6d80b0de224f59b6b6e19d37c3c",
+                "sha256:c7658aab75c920288a8cf6f09f244c6cfdae30d82d803ac1634d9f223a80ca08"
             ],
-            "version": "==1.0.1"
+            "version": "==1.8.5"
         },
-        "sphinxcontrib-htmlhelp": {
+        "sphinxcontrib-websupport": {
             "hashes": [
-                "sha256:4670f99f8951bd78cd4ad2ab962f798f5618b17675c35c5ac3b2132a14ea8422",
-                "sha256:d4fd39a65a625c9df86d7fa8a2d9f3cd8299a3a4b15db63b50aac9e161d8eff7"
+                "sha256:1501befb0fdf1d1c29a800fdbf4ef5dc5369377300ddbdd16d2cd40e54c6eefc",
+                "sha256:e02f717baf02d0b6c3dd62cf81232ffca4c9d5c331e03766982e3ff9f1d2bc3f"
             ],
-            "version": "==1.0.2"
-        },
-        "sphinxcontrib-jsmath": {
-            "hashes": [
-                "sha256:2ec2eaebfb78f3f2078e73666b1415417a116cc848b72e5172e596c871103178",
-                "sha256:a9925e4a4587247ed2191a22df5f6970656cb8ca2bd6284309578f2153e0c4b8"
-            ],
-            "version": "==1.0.1"
+            "version": "==1.1.2"
         },
-        "sphinxcontrib-qthelp": {
+        "typing": {
             "hashes": [
-                "sha256:513049b93031beb1f57d4daea74068a4feb77aa5630f856fcff2e50de14e9a20",
-                "sha256:79465ce11ae5694ff165becda529a600c754f4bc459778778c7017374d4d406f"
+                "sha256:91dfe6f3f706ee8cc32d38edbbf304e9b7583fb37108fef38229617f8b3eba23",
+                "sha256:c8cabb5ab8945cd2f54917be357d134db9cc1eb039e59d1606dc1e60cb1d9d36",
+                "sha256:f38d83c5a7a7086543a0f649564d661859c5146a85775ab90c0d2f93ffaa9714"
             ],
-            "version": "==1.0.2"
-        },
-        "sphinxcontrib-serializinghtml": {
-            "hashes": [
-                "sha256:c0efb33f8052c04fd7a26c0a07f1678e8512e0faec19f4aa8f2473a8b81d5227",
-                "sha256:db6615af393650bf1151a6cd39120c29abaf93cc60db8c48eb2dddbfdc3a9768"
-            ],
-            "version": "==1.1.3"
+            "markers": "python_version < '3.5'",
+            "version": "==3.7.4.1"
         },
         "urllib3": {
             "hashes": [
-                "sha256:3de946ffbed6e6746608990594d08faac602528ac7015ac28d33cee6a45b7398",
-                "sha256:9a107b99a5393caf59c7aa3c1249c16e6879447533d0887f4336dde834c7be86"
+                "sha256:2f3db8b19923a873b3e5256dc9c2dedfa883e33d87c690d9c7913e1f40673cdc",
+                "sha256:87716c2d2a7121198ebcb7ce7cccf6ce5e9ba539041cfbaeecfb641dc0bf6acc"
             ],
             "index": "pypi",
-            "version": "==1.25.6"
+            "version": "==1.25.8"
         },
         "zipp": {
             "hashes": [
-                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
-                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
+                "sha256:c70410551488251b0fee67b460fb9a536af8d6f9f008ad10ac51f615b6a521b1",
+                "sha256:e0d9e63797e483a30d27e09fffd308c59a700d365ec34e93cc100844168bf921"
             ],
-            "version": "==0.6.0"
+            "version": "==1.2.0"
         }
     }
 }
diff --git a/flask_sieve/rules_processor.py b/flask_sieve/rules_processor.py
index df8bf38..a3be94b 100644
--- a/flask_sieve/rules_processor.py
+++ b/flask_sieve/rules_processor.py
@@ -41,13 +41,18 @@ def passes(self):
                 handler = self._get_rule_handler(rule['name'])
                 value = self._attribute_value(attribute)
                 attr_type = self._get_type(value, rules)
-                is_valid = handler(
-                    value=value,
-                    attribute=attribute,
-                    params=rule['params'],
-                    nullable=nullable,
-                    rules=rules
-                )
+                is_valid = False
+                if value is None and nullable:
+                    is_valid = True
+                else:
+                    is_valid = handler(
+                        value=value,
+                        attribute=attribute,
+                        params=rule['params'],
+                        nullable=nullable,
+                        rules=rules
+                    )
+
                 validations.append({
                     'attribute': attribute,
                     'rule': rule['name'],
diff --git a/requirements.txt b/requirements.txt
index 484e5fd..6a367c9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,40 +1,51 @@
 alabaster==0.7.12
-Babel==2.7.0
-certifi==2019.9.11
+Babel==2.8.0
+certifi==2019.11.28
+cffi==1.14.0
 chardet==3.0.4
-Click==7.0
+click==7.1.1
 commonmark==0.9.1
-coverage==4.5.4
-coveralls==1.8.2
+configparser==4.0.2
+contextlib2==0.6.0.post1
+coverage==5.0.4
+coveralls==1.11.1
+cryptography==2.8
 docopt==0.6.2
-docutils==0.15.2
+docutils==0.16
+enum34==1.1.10
 Flask==1.1.1
-idna==2.8
-imagesize==1.1.0
-importlib-metadata==0.23
+future==0.18.2
+idna==2.9
+imagesize==1.2.0
+importlib-metadata==1.6.0
+ipaddress==1.0.23
 itsdangerous==1.1.0
-Jinja2==2.10.3
+Jinja2==2.11.1
 MarkupSafe==1.1.1
-more-itertools==7.2.0
 nose==1.3.7
-packaging==19.2
-Pallets-Sphinx-Themes==1.2.2
-Pillow==6.2.1
-Pygments==2.4.2
-pyparsing==2.4.2
-python-dateutil==2.8.0
+packaging==20.3
+Pallets-Sphinx-Themes==1.2.3
+pathlib2==2.3.5
+Pillow==6.2.2
+pycparser==2.20
+Pygments==2.5.2
+pyOpenSSL==19.1.0
+pyparsing==2.4.6
+python-dateutil==2.8.1
 pytz==2019.3
 recommonmark==0.6.0
-requests==2.22.0
-six==1.12.0
+requests==2.23.0
+scandir==1.10.0
+six==1.14.0
 snowballstemmer==2.0.0
-Sphinx==2.2.1
+Sphinx==1.8.5
 sphinxcontrib-applehelp==1.0.1
 sphinxcontrib-devhelp==1.0.1
 sphinxcontrib-htmlhelp==1.0.2
-sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.2
 sphinxcontrib-serializinghtml==1.1.3
-urllib3==1.25.6
-Werkzeug==0.16.0
-zipp==0.6.0
+sphinxcontrib-websupport==1.1.2
+typing==3.7.4.1
+urllib3==1.25.8
+Werkzeug==1.0.1
+zipp==1.2.0
diff --git a/tests/test_rules_processor.py b/tests/test_rules_processor.py
index ffdd05a..274ad60 100644
--- a/tests/test_rules_processor.py
+++ b/tests/test_rules_processor.py
@@ -866,6 +866,17 @@ def test_validates_url(self):
             request={'field': 'hi'}
         )
 
+    def test_allows_nullable_fields(self):
+        self.assert_passes(
+            rules={'field': ['integer', 'nullable']},
+            request={}
+        )
+        self.assert_passes(
+            rules={'field': ['string', 'email', 'nullable']},
+            request={}
+        )
+
+
     def test_validates_uuid(self):
         self.assert_passes(
             rules={'field': ['uuid']},