From 4a8250c31e1a2d3101527ef8d1d0e9090ef65b38 Mon Sep 17 00:00:00 2001
From: Umed Khudoiberdiev <zarrhost@gmail.com>
Date: Sat, 10 Dec 2016 16:25:16 +0500
Subject: [PATCH] added migration interface

---
 src/driver/mysql/MysqlQueryRunner.ts |  4 ++--
 src/migration/MigrationInterface.ts  | 16 ++++++++++++++++
 src/query-runner/QueryRunner.ts      |  2 +-
 3 files changed, 19 insertions(+), 3 deletions(-)
 create mode 100644 src/migration/MigrationInterface.ts

diff --git a/src/driver/mysql/MysqlQueryRunner.ts b/src/driver/mysql/MysqlQueryRunner.ts
index 983701083..3f9615bfe 100644
--- a/src/driver/mysql/MysqlQueryRunner.ts
+++ b/src/driver/mysql/MysqlQueryRunner.ts
@@ -336,8 +336,8 @@ export class MysqlQueryRunner implements QueryRunner {
     /**
      * Checks if table with the given name exist in the database.
      */
-    async hasTable(table: TableSchema): Promise<boolean> {
-        const sql = `SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = '${this.dbName}' AND TABLE_NAME = '${table.name}'`;
+    async hasTable(tableName: string): Promise<boolean> {
+        const sql = `SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = '${this.dbName}' AND TABLE_NAME = '${tableName}'`;
         const result = await this.query(sql);
         return result.length ? true : false;
     }
diff --git a/src/migration/MigrationInterface.ts b/src/migration/MigrationInterface.ts
new file mode 100644
index 000000000..cff6acde2
--- /dev/null
+++ b/src/migration/MigrationInterface.ts
@@ -0,0 +1,16 @@
+import {Connection} from "../connection/Connection";
+import {QueryRunner} from "../query-runner/QueryRunner";
+
+export interface MigrationInterface {
+
+    /**
+     * Run the migrations.
+     */
+    up(queryRunner: QueryRunner, connection: Connection): Promise<any>;
+
+    /**
+     * Reverse the migrations.
+     */
+    down(queryRunner: QueryRunner, connection: Connection): Promise<any>;
+
+}
\ No newline at end of file
diff --git a/src/query-runner/QueryRunner.ts b/src/query-runner/QueryRunner.ts
index 3efc233d4..5fd6e72da 100644
--- a/src/query-runner/QueryRunner.ts
+++ b/src/query-runner/QueryRunner.ts
@@ -92,7 +92,7 @@ export interface QueryRunner {
     /**
      * Checks if table with the given name exist in the database.
      */
-    hasTable(table: TableSchema): Promise<boolean>;
+    hasTable(tableName: string): Promise<boolean>;
 
     /**
      * Creates a new table from the given table metadata and column metadatas.