Configura banco de dados com link do Docker

project_name/settings.py

@@ -11,12 +11,8 @@ https://docs.djangoproject.com/en/1.9/ref/settings/
 import os
 import dj_database_url
-def get_env_bool(var, default=False):
-    value = os.environ.get(var)
-    if value is None:
-        return default
-    return not value.lower() in {'0', 'false', 'no'}
+from .utils import get_database, get_env_bool
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
@@ -94,7 +90,10 @@ WSGI_APPLICATION = '{{ project_name }}.wsgi.application'
 # https://docs.djangoproject.com/en/1.9/ref/settings/#databases
 DATABASES = {
-    'default': dj_database_url.config(default='sqlite:///' + os.path.join(BASE_DIR, 'db.sqlite3'), conn_max_age=500),
+    'default': dj_database_url.parse(
+        get_database('sqlite:///' + os.path.join(BASE_DIR, 'db.sqlite3')),
+        conn_max_age=500,
+    ),
 }

project_name/utils.py

+import os
+
+
+# ENV
+
+def get_env_bool(var, default=False):
+    value = os.environ.get(var)
+    if value is None:
+        return default
+    return not value.lower() in {'0', 'false', 'no'}
+
+
+# DATABASE
+
+def get_database_pg():
+    if 'POSTGRES_ENV_POSTGRES_DB' not in os.environ:
+        return ''
+    return 'postgres://%s:%s@%s:%s/%s' % (
+        os.environ.get('POSTGRES_ENV_POSTGRES_USER', 'postgres'),
+        os.environ.get('POSTGRES_ENV_POSTGRES_PASSWORD', ''),
+        os.environ['POSTGRES_PORT_5432_TCP_ADDR'],
+        os.environ['POSTGRES_PORT_5432_TCP_PORT'],
+        os.environ['POSTGRES_ENV_POSTGRES_DB'],
+    )
+
+
+def get_database_my():
+    if 'MYSQL_ENV_MYSQL_DATABASE' not in os.environ:
+        return ''
+    return 'mysql://%s:%s@%s:%s/%s' % (
+        os.environ.get('MYSQL_ENV_MYSQL_USER', 'root'),
+        os.environ.get('MYSQL_ENV_MYSQL_PASSWORD',
+                       os.environ['MYSQL_ENV_MYSQL_ROOT_PASSWORD']),
+        os.environ['MYSQL_PORT_3306_TCP_ADDR'],
+        os.environ['MYSQL_PORT_3306_TCP_PORT'],
+        os.environ['MYSQL_ENV_MYSQL_DATABASE'],
+    )
+
+
+def get_database(default):
+    return os.environ.get('DATABASE_URL', '') or \
+        get_database_pg() or \
+        get_database_my() or \
+        default