- feat: Sales estimates.

- feat: Sales invoices.
- feat: Sales payment receives.
- feat: Purchases bills.
- feat: Purchases bills payments that made to the vendors.

server/src/models/BillPayment.js

@@ -1,4 +1,4 @@
-import { mixin } from 'objection';
+import { Model, mixin } from 'objection';
 import TenantModel from '@/models/TenantModel';
 import CachableQueryBuilder from '@/lib/Cachable/CachableQueryBuilder';
 import CachableModel from '@/lib/Cachable/CachableModel';
@@ -25,4 +25,33 @@ export default class BillPayment extends mixin(TenantModel, [CachableModel]) {
   static get QueryBuilder() {
     return CachableQueryBuilder;
   }
+
+  static changePaymentAmount(billId, amount) {
+    const changeMethod = amount > 0 ? 'increment' : 'decrement';
+    return this.tenant()
+      .query()
+      .where('id', billId)
+      [changeMethod]('payment_amount', Math.abs(amount));
+  }
+
+  /**
+   * Relationship mapping.
+   */
+  static get relationMappings() {
+    const BillPaymentEntry = require('@/models/BillPaymentEntry');
+
+    return {
+      /**
+       * Account model may belongs to account type.
+       */
+      entries: {
+        relation: Model.BelongsToOneRelation,
+        modelClass: this.relationBindKnex(BillPaymentEntry.default),
+        join: {
+          from: 'bills_payments.id',
+          to: 'bills_payments_entries.billPaymentId',
+        },
+      },
+    };
+  }
 }