Merge pull request #469 from ISlavinskyi/fix-connection-error-output

Added more informative output when unable to connect.

Author: kamilmysliwiec

lib/common/typeorm.utils.ts

@@ -111,19 +111,24 @@ export function handleRetry(
   retryAttempts = 9,
   retryDelay = 3000,
   connectionName = DEFAULT_CONNECTION_NAME,
+  verboseRetryLog = false,
 ): <T>(source: Observable<T>) => Observable<T> {
   return <T>(source: Observable<T>) =>
     source.pipe(
-      retryWhen(e =>
+      retryWhen((e) =>
         e.pipe(
           scan((errorCount, error: Error) => {
             const connectionInfo =
               connectionName === DEFAULT_CONNECTION_NAME
                 ? ''
                 : ` (${connectionName})`;
+            const verboseMessage = verboseRetryLog
+              ? ` Message: ${error.message}.`
+              : '';
             logger.error(
-              `Unable to connect to the database${connectionInfo}. Retrying (${errorCount +
-                1})...`,
+              `Unable to connect to the database${connectionInfo}.${verboseMessage} Retrying (${
+                errorCount + 1
+              })...`,
               error.stack,
             );
             if (errorCount + 1 >= retryAttempts) {

lib/interfaces/typeorm-options.interface.ts

@@ -21,6 +21,10 @@ export type TypeOrmModuleOptions = {
    * If `true`, connection will not be closed on application shutdown.
    */
   keepConnectionAlive?: boolean;
+  /**
+   * If `true`, will show verbose error messages on each connection retry.
+   */
+  verboseRetryLog?: boolean;
 } & Partial<ConnectionOptions>;
 
 export interface TypeOrmOptionsFactory {

lib/typeorm-core.module.ts

@@ -198,7 +198,12 @@ export class TypeOrmCoreModule implements OnApplicationShutdown {
       } as ConnectionOptions);
     })
       .pipe(
-        handleRetry(options.retryAttempts, options.retryDelay, connectionToken),
+        handleRetry(
+          options.retryAttempts,
+          options.retryDelay,
+          connectionToken,
+          options.verboseRetryLog,
+        ),
       )
       .toPromise();
   }