add server to monorepo.

packages/server/src/models/SaleInvoiceEntry.ts

@@ -0,0 +1,29 @@
+import { Model } from 'objection';
+import TenantModel from 'models/TenantModel';
+
+export default class SaleInvoiceEntry extends TenantModel {
+  /**
+   * Table name
+   */
+  static get tableName() {
+    return 'sales_invoices_entries';
+  }
+
+  /**
+   * Relationship mapping.
+   */
+  static get relationMappings() {
+    const SaleInvoice = require('models/SaleInvoice');
+
+    return {
+      saleInvoice: {
+        relation: Model.BelongsToOneRelation,
+        modelClass: SaleInvoice.default,
+        join: {
+          from: 'sales_invoices_entries.sale_invoice_id',
+          to: 'sales_invoices.id',
+        },
+      },
+    };
+  }
+}