make db migration configurable

Author: imcaizheng

README.md

@@ -73,6 +73,13 @@ The following parameters can be set in config files or in env variables:
 
 Configuration for migration is at `./config/config.json`.
 
+The following parameters can be set in the config file or via env variables:
+
+- `username`: set via env `DB_USERNAME`; datebase username
+- `password`: set via env `DB_PASSWORD`; datebase password
+- `database`: set via env `DB_NAME`; datebase name
+- `host`: set via env `DB_HOST`; datebase host name
+
 ## ElasticSearch Setup
 - Go to https://www.elastic.co/downloads/ download and install the elasticsearch.
 - Modify `esConfig` under `config/default.js` to meet your environment.

config/config.js

@@ -0,0 +1,27 @@
+/*
+ * Configuration for DB migration.
+ */
+
+module.exports = {
+  development: {
+    username: process.env.DB_USERNAME || 'postgres',
+    password: process.env.DB_PASSWORD || 'postgres',
+    database: process.env.DB_NAME || 'postgres',
+    host: process.env.DB_HOST || '127.0.0.1',
+    dialect: 'postgres'
+  },
+  test: {
+    username: process.env.DB_USERNAME || 'postgres',
+    password: process.env.DB_PASSWORD || 'postgres',
+    database: process.env.DB_NAME || 'postgres',
+    host: process.env.DB_HOST || '127.0.0.1',
+    dialect: 'postgres'
+  },
+  production: {
+    username: process.env.DB_USERNAME,
+    password: process.env.DB_PASSWORD,
+    database: process.env.DB_NAME,
+    host: process.env.DB_HOST,
+    dialect: 'postgres'
+  }
+}