refactor: Refactor queries by using related query from objectionjs

packages/backend/src/models/user.ts

@@ -1,12 +1,15 @@
 import { QueryContext, ModelOptions } from 'objection';
 import Base from './base';
 import Connection from './connection';
+import Flow from './flow';
 import bcrypt from 'bcrypt';
 
 class User extends Base {
-  id!: number
-  email!: string
-  password!: string
+  id!: number;
+  email!: string;
+  password!: string;
+  connections?: [Connection];
+  flows?: [Flow];
 
   static tableName = 'users';
 
@@ -18,8 +21,8 @@ class User extends Base {
       id: { type: 'integer' },
       email: { type: 'string', format: 'email', minLength: 1, maxLength: 255 },
       password: { type: 'string', minLength: 1, maxLength: 255 },
-    }
-  }
+    },
+  };
 
   static relationMappings = () => ({
     connections: {
@@ -29,8 +32,16 @@ class User extends Base {
         from: 'users.id',
         to: 'connections.user_id',
       },
-    }
-  })
+    },
+    flows: {
+      relation: Base.HasManyRelation,
+      modelClass: Flow,
+      join: {
+        from: 'users.id',
+        to: 'flows.user_id',
+      },
+    },
+  });
 
   login(password: string) {
     return bcrypt.compare(password, this.password);
@@ -42,14 +53,14 @@ class User extends Base {
 
   async $beforeInsert(queryContext: QueryContext) {
     await super.$beforeInsert(queryContext);
-    await this.generateHash()
+    await this.generateHash();
   }
 
   async $beforeUpdate(opt: ModelOptions, queryContext: QueryContext) {
     await super.$beforeUpdate(opt, queryContext);
 
-    if(this.password) {
-      await this.generateHash()
+    if (this.password) {
+      await this.generateHash();
     }
   }
 }