add server to monorepo.

packages/server/src/models/Model.ts

@@ -0,0 +1,48 @@
+import { Model, mixin } from 'objection';
+import { snakeCase, transform } from 'lodash';
+import { mapKeysDeep } from 'utils';
+import PaginationQueryBuilder from 'models/Pagination';
+import DateSession from 'models/DateSession';
+
+export default class ModelBase extends mixin(Model, [DateSession]) {
+  get timestamps() {
+    return [];
+  }
+
+  static get knexBinded() {
+    return this.knexBindInstance;
+  }
+
+  static set knexBinded(knex) {
+    this.knexBindInstance = knex;
+  }
+
+  static get collection() {
+    return Array;
+  }
+
+  static query(...args) {
+    return super.query(...args).runAfter((result) => {
+      if (Array.isArray(result)) {
+        return this.collection.from(result);
+      }
+      return result;
+    });
+  }
+
+  static get QueryBuilder() {
+    return PaginationQueryBuilder;
+  }
+
+  static relationBindKnex(model) {
+    return this.knexBinded ? model.bindKnex(this.knexBinded) : model;
+  }
+
+  static changeAmount(whereAttributes, attribute, amount, trx) {
+    const changeMethod = amount > 0 ? 'increment' : 'decrement';
+
+    return this.query(trx)
+      .where(whereAttributes)
+      [changeMethod](attribute, Math.abs(amount));
+  }
+}