Created migration for view creation

sequelize/migrations/20220728093646-token-transactions-view.js

@@ -0,0 +1,79 @@
+'use strict';
+
+module.exports = {
+  async up (queryInterface, Sequelize) {
+    return queryInterface.sequelize.query(
+      `
+      CREATE OR REPLACE VIEW public.view_token_transactions AS 
+      WITH transfer_events AS (
+        SELECT
+            timestamp,    
+            block_number,
+            block_index, 
+            (phase::jsonb->>'applyExtrinsic')::int AS extrinsic_index,
+            (data::jsonb->>0)::int AS collection_id,
+            (data::jsonb->>1)::int AS token_id
+        FROM event 
+        WHERE section='common' AND method='Transfer'
+        ORDER BY timestamp DESC
+      )
+      SELECT 
+          ev.block_index,
+          ev.timestamp,
+          ev.collection_id,
+          ev.token_id,
+
+          ex.signer,
+          ex.signer_normalized,
+          ex.to_owner,
+          ex.to_owner_normalized,
+
+          c.name AS collection_name,
+          c.token_prefix AS token_prefix,
+
+          t.data->>'name' AS token_name,
+
+          COALESCE(
+              t.data::json ->> 'ipfsJson'::text,
+              replace(
+                COALESCE(c.offchain_schema, ''::text),
+                '{id}'::text,
+                ev.token_id::character varying(255)::text
+              ),
+              ''::text
+            ) AS image_path
+      FROM transfer_events AS ev
+
+      INNER JOIN extrinsic AS ex ON 
+          ev.block_number = ex.block_number
+          AND ev.extrinsic_index = ex.extrinsic_index
+          AND ex.method = 'transfer'
+
+      INNER JOIN collections AS c ON
+          ev.collection_id = c.collection_id
+
+      INNER JOIN tokens AS t ON
+          ev.collection_id = t.collection_id
+          AND ev.token_id = t.token_id;SELECT t.token_id,
+            t.collection_id,
+            t.data,
+            t.owner,
+            t.owner_normalized,
+            t.owner != c.owner AS is_sold,
+            COALESCE(t.data::json ->> 'ipfsJson'::text, replace(COALESCE(c.offchain_schema, ''::text), '{id}'::text, t.token_id::character varying(255)::text), ''::text) AS image_path,
+            c.token_prefix,
+            c.name AS collection_name,
+            c.description AS collection_description,
+            c.variable_on_chain_schema::json ->> 'collectionCover'::text AS collection_cover,
+            c.owner AS collection_owner,
+            c.owner_normalized AS collection_owner_normalized,
+            t.date_of_creation
+          FROM tokens t
+            LEFT JOIN collections c ON c.collection_id = t.collection_id;`
+    );
+  },
+
+  async down (queryInterface, Sequelize) {
+    return queryInterface.sequelize.query('DROP VIEW view_token_transactions;');
+  }
+};