Setup eslint and enforce rules

src/orm/services/Database.ts

@@ -1,10 +1,10 @@
-import {Inject, Singleton} from "../../di";
-import {DatabaseService} from "../DatabaseService";
-import {PostgresConnection} from "../connection/PostgresConnection";
-import {ErrorWithContext} from "../../util";
-import {Unit} from "../../lifecycle/Unit";
-import {Config} from "../../service/Config";
-import {Logging} from "../../service/Logging";
+import {Inject, Singleton} from '../../di'
+import {DatabaseService} from '../DatabaseService'
+import {PostgresConnection} from '../connection/PostgresConnection'
+import {ErrorWithContext} from '../../util'
+import {Unit} from '../../lifecycle/Unit'
+import {Config} from '../../service/Config'
+import {Logging} from '../../service/Logging'
 
 /**
  * Application unit responsible for loading and creating database connections from config.
@@ -24,12 +24,15 @@ export class Database extends Unit {
      * Load the `database.connections` config and register Connection instances for each config.
      * Automatically initializes the connections.
      */
-    public async up() {
+    public async up(): Promise<void> {
         const connections = this.config.get('database.connections')
         const promises = []
 
         for ( const key in connections ) {
-            if ( !connections.hasOwnProperty(key) ) continue
+            if ( !Object.prototype.hasOwnProperty.call(connections, key) ) {
+                continue
+            }
+
             const config = connections[key]
 
             this.logging.info(`Initializing database connection: ${key}`)
@@ -55,7 +58,7 @@ export class Database extends Unit {
     /**
      * Close the configured connections cleanly before exit.
      */
-    public async down() {
+    public async down(): Promise<void> {
         await Promise.all(this.dbService.names()
             .map(name => this.dbService.get(name).close()))
     }