Fix video files duplicated when fps is null

Null values are not considered equal in a UNIQUE index

server/initializers/migrations/0275-video-file-unique.ts

@@ -0,0 +1,34 @@
+import * as Sequelize from 'sequelize'
+
+async function up (utils: {
+  transaction: Sequelize.Transaction
+  queryInterface: Sequelize.QueryInterface
+  sequelize: Sequelize.Sequelize
+}): Promise<any> {
+  {
+    const query = 'DELETE FROM "videoFile" vf1 USING "videoFile" vf2 WHERE vf1.id < vf2.id ' +
+      'AND vf1."videoId" = vf2."videoId" AND vf1.resolution = vf2.resolution AND vf1.fps IS NULL'
+    await utils.sequelize.query(query)
+  }
+
+  {
+    const query = 'UPDATE "videoFile" SET fps = -1 WHERE fps IS NULL;'
+    await utils.sequelize.query(query)
+  }
+
+  {
+    const data = {
+      type: Sequelize.INTEGER,
+      allowNull: false,
+      defaultValue: -1
+    }
+    await utils.queryInterface.changeColumn('videoFile', 'fps', data)
+  }
+
+}
+
+function down (options) {
+  throw new Error('Not implemented.')
+}
+
+export { up, down }