Remove redundant 'sqla/app2' example.

examples/sqla/README.rst

@@ -16,10 +16,9 @@ To run this example:
 
     pip install -r 'examples/sqla/requirements.txt'
 
-4. Run either of these applications::
+4. Run the application::
 
     python examples/sqla/app.py
-    python examples/sqla/app2.py
 
 The first time you run this example, a sample sqlite database gets populated automatically. To suppress this behaviour,
 comment the following lines in app.py:::

examples/sqla/app.py

@@ -100,6 +100,7 @@ def index():
 
 # Customized User model admin
 class UserAdmin(sqla.ModelView):
+    column_display_pk = True
     column_list = [
         'id',
         'last_name',

examples/sqla/app2.py

-from flask import Flask
-from flask_sqlalchemy import SQLAlchemy
-
-import flask_admin as admin
-from flask_admin.contrib import sqla
-
-
-# Create application
-app = Flask(__name__)
-
-
-# Create dummy secrey key so we can use sessions
-app.config['SECRET_KEY'] = '123456790'
-
-# Create in-memory database
-app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///sample_db_2.sqlite'
-app.config['SQLALCHEMY_ECHO'] = True
-db = SQLAlchemy(app)
-
-# Flask views
-@app.route('/')
-def index():
-    return '<a href="/admin/">Click me to get to Admin!</a>'
-
-
-class Car(db.Model):
-    __tablename__ = 'cars'
-    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
-    desc = db.Column(db.String(50))
-
-    def __str__(self):
-        return self.desc
-
-
-class Tyre(db.Model):
-    __tablename__ = 'tyres'
-    car_id = db.Column(db.Integer, db.ForeignKey('cars.id'), primary_key=True)
-    tyre_id = db.Column(db.Integer, primary_key=True)
-    car = db.relationship('Car', backref='tyres')
-    desc = db.Column(db.String(50))
-
-
-class CarAdmin(sqla.ModelView):
-    column_display_pk = True
-    form_columns = ['id', 'desc']
-
-
-class TyreAdmin(sqla.ModelView):
-    column_display_pk = True
-    form_columns = ['car', 'tyre_id', 'desc']
-
-# Create admin
-admin = admin.Admin(app, name='Example: SQLAlchemy2', template_mode='bootstrap3')
-admin.add_view(CarAdmin(Car, db.session))
-admin.add_view(TyreAdmin(Tyre, db.session))
-
-if __name__ == '__main__':
-
-    # Create DB
-    db.create_all()
-
-    # Start app
-    app.run(debug=True)