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Support multiple bodies (#900)
It's possible for an endpoint to allow multiple content-types. In this case, the caller should select one at runtime, rather than one being picked arbitrarily. This is a breaking change because instead of separate named params per type of body, there is only one body parameter (to better reflect that a choice is required). Closes #822 --------- Co-authored-by: Karl Gutwin <[email protected]> Co-authored-by: Dylan Anthony <[email protected]>
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‎.changeset/always_use_correct_content_type_for_requests.md‎

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---
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default: patch
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---
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# Always use correct content type for requests
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In previous versions, a request body that was similar to a known content type would use that content type in the request. For example `application/json` would be used for `application/vnd.api+json`. This was incorrect and could result in invalid requests being sent.
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Now, the content type defined in the OpenAPI document will always be used.

‎.changeset/renamed_body_types_and_parameters.md‎

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---
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default: major
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---
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# Renamed body types and parameters
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PR #900 addresses #822.
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Where previously there would be one body parameter per supported content type, now there is a single `body` parameter which takes a union of all the possible inputs. This correctly models the fact that only one body can be sent (and ever would be sent) in a request.
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For example, when calling a generated endpoint, code which used to look like this:
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```python
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post_body_multipart.sync_detailed(
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client=client,
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multipart_data=PostBodyMultipartMultipartData(),
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)
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```
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Will now look like this:
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```python
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post_body_multipart.sync_detailed(
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client=client,
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body=PostBodyMultipartBody(),
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)
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```
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Note that both the input parameter name _and_ the class name have changed. This should result in simpler code when there is only a single body type and now produces correct code when there are multiple body types.

‎.changeset/support_multiple_possible_requestbody.md‎

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---
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default: minor
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---
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# Support multiple possible `requestBody`
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PR #900 addresses #822.
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It is now possible in some circumstances to generate valid code for OpenAPI documents which have multiple possible `requestBody` values. Previously, invalid code could have been generated with no warning (only one body could actually be sent).
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Only one content type per "category" is currently supported at a time. The categories are:
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- JSON, like `application/json`
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- Binary data, like `application/octet-stream`
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- Encoded form data, like `application/x-www-form-urlencoded`
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- Files, like `multipart/form-data`

‎end_to_end_tests/baseline_openapi_3.0.json‎

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"version": "0.1.0"
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},
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"paths": {
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"/bodies/multiple": {
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"post": {
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"description": "Test multiple bodies",
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"tags": [
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"bodies"
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],
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"requestBody": {
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"content": {
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"application/json": {
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"schema": {
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"type": "object",
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"properties": {
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"a": {
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"type": "string"
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}
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}
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}
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},
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"application/octet-stream": {
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"schema": {
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"type": "string",
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"format": "binary"
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}
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},
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"application/x-www-form-urlencoded": {
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"schema": {
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"type": "object",
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"properties": {
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"a": {
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"type": "string"
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}
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}
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}
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},
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"multipart/form-data": {
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"schema": {
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"type": "object",
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"properties": {
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"a": {
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"type": "string"
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}
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}
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}
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}
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}
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},
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"responses": {
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"200": {
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"description": "OK"
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}
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}
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}
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},
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"/bodies/json-like": {
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"post": {
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"tags": ["bodies"],
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"description": "A content type that works like json but isn't application/json",
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"operationId": "json-like",
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"requestBody": {
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"content": {
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"application/vnd+json": {
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"schema": {
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"type": "object",
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"properties": {
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"a": {
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"type": "string"
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}
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}
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}
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}
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}
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},
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"responses": {
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"200": {
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"description": "OK"
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}
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}
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}
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},
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"/tests/": {
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"get": {
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"tags": [
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},
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"/responses/unions/simple_before_complex": {
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"post": {
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"tags": ["responses"],
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"tags": [
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"responses"
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],
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"description": "Regression test for #603",
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"responses": {
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"200": {
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"application/json": {
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"schema": {
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"type": "object",
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"required": ["a"],
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"required": [
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"a"
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],
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"properties": {
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"a": {
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"oneOf": [
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{"type": "string"},
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{"type": "object"}
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{
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"type": "string"
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},
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{
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"type": "object"
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}
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]
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}
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}
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},
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"parameters": [
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{
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"name": "param",
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"in": "query",
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"schema": {
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"type": "string"
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}
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},
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{
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"name": "param",
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"in": "path",
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"required": true,
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"schema": {
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"type": "string"
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}
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"name": "param",
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"in": "query",
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"schema": {
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"type": "string"
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}
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},
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{
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"name": "param",
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"in": "path",
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"required": true,
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"schema": {
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"type": "string"
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}
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}
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]
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},
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"/same-name-multiple-locations/{param}": {
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},
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"/tag_with_number": {
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"get": {
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"tags": ["1"],
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"tags": [
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"1"
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],
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"responses": {
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"/naming/property-conflict-with-import": {
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"description": "Ensure that property names don't conflict with imports",
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"post": {
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"tags": ["naming"],
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"tags": [
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"naming"
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],
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"requestBody": {
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"application/json": {
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{
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"$ref": "#/components/parameters/integer-param"
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},
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{"$ref": "#/components/parameters/header-param"},
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{"$ref": "#/components/parameters/cookie-param"},
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{"$ref": "#/components/parameters/path-param"}
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{
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"$ref": "#/components/parameters/header-param"
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},
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{
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"$ref": "#/components/parameters/cookie-param"
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},
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{
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"$ref": "#/components/parameters/path-param"
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}
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],
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"responses": {
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"200": {
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},
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"Body_upload_file_tests_upload_post": {
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"title": "Body_upload_file_tests_upload_post",
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"required": ["some_file", "some_object", "some_nullable_object"],
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"required": [
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"some_file",
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"some_object",
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"some_nullable_object"
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],
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"some_file": {
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"title": "Some Object",
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"type": "object",
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"required": ["num", "text"],
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"num",
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],
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"properties": {
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"some_optional_object": {
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"title": "Some Optional Object",
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"type": "object",
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"required": ["foo"],
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"required": [
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"foo"
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],
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},
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"type_enum": {
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]
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},
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},
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"type": {
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"type": "string",
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"submodel"
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]
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},
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"type": "integer",
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]
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},
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"type_enum": {
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]
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}
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}
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},
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}
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}
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},
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"ModelWithDateTimeProperty" : {
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"ModelWithDateTimeProperty": {
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"type": "object",
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"properties": {
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"datetime": {
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"type": "string",
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"format": "byte"
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},
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"import": {
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"import": {
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"type": "object"
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},
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"None": {
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"None": {
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"type": "object"
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},
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"model.reference.with.Periods": {

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