chore(logging): switch to debug package for logging

considering loopback core uses it

Author: shubhamp-sf

package-lock.json

@@ -49,6 +49,7 @@
     "@loopback/rest": "^12.0.4"
   },
   "dependencies": {
+    "debug": "^4.3.4",
     "sequelize": "^6.25.2",
     "tslib": "^2.0.0"
   },

package.json

@@ -1,11 +1,15 @@
 import {LifeCycleObserver} from '@loopback/core';
 import {AnyObject, juggler} from '@loopback/repository';
+import debugFactory from 'debug';
 import {Options as SequelizeOptions, Sequelize} from 'sequelize';
 import {
   SupportedConnectorMapping as supportedConnectorMapping,
   SupportedLoopbackConnectors,
 } from './connector-mapping';
 
+const debug = debugFactory('loopback:sequelize:datasource');
+const queryLogging = debugFactory('loopback:sequelize:queries');
+
 export class SequelizeDataSource
   extends juggler.DataSource
   implements LifeCycleObserver
@@ -29,6 +33,7 @@ export class SequelizeDataSource
   async init(): Promise<void> {
     const connector = this.config.connector;
     const storage = this.config.file;
+
     this.sequelize = new Sequelize({
       database: this.config.database,
       ...(connector ? {dialect: supportedConnectorMapping[connector]} : {}),
@@ -37,17 +42,18 @@ export class SequelizeDataSource
       port: this.config.port,
       username: this.config.user ?? this.config.username,
       password: this.config.password,
-      logging: false,
+      logging: queryLogging,
     });
+
     try {
       await this.sequelize.authenticate();
-      console.log('Connection has been established successfully.');
+      debug('Connection has been established successfully.');
     } catch (error) {
       console.error('Unable to connect to the database:', error);
     }
   }
   stop() {
-    this.sequelize?.close?.().catch(console.log);
+    this.sequelize?.close?.().catch(console.error);
   }
 }
 

src/sequelize/sequelize.datasource.base.ts

@@ -11,6 +11,7 @@ import {
   PropertyDefinition,
   Where,
 } from '@loopback/repository';
+import debugFactory from 'debug';
 import {
   Attributes,
   DataType,
@@ -31,6 +32,7 @@ import {operatorTranslations} from './operator-translation';
 import {SequelizeDataSource} from './sequelize.datasource.base';
 import {SequelizeModel} from './sequelize.model';
 import {isTruelyObject} from './utils';
+const debug = debugFactory('loopback:sequelize:repository');
 
 /**
  * Default `order` filter style if only column name is specified
@@ -358,6 +360,11 @@ export class SequelizeRepository<
       },
     );
 
+    debug(
+      'Table name supplied to sequelize',
+      this.entityClass.modelName.toLowerCase(),
+    );
+
     return this.dataSource.sequelize.models[this.entityClass.modelName];
   }
 
@@ -368,7 +375,7 @@ export class SequelizeRepository<
   async syncSequelizeModel(options: SyncOptions = {}) {
     await this.dataSource.sequelize?.models[this.entityClass.modelName]
       .sync(options)
-      .catch(console.log);
+      .catch(console.error);
   }
 
   /**
@@ -410,6 +417,8 @@ export class SequelizeRepository<
 
       sequelizeDefinition[propName] = columnOptions;
     }
+
+    debug('Sequelize model definition', sequelizeDefinition);
     return sequelizeDefinition;
   }