Flask Python, trying to return list or dict to Ajax call

Question

Within a Flask app, I have the following ajax call:

    $.ajax({             url: "{{ url_for( 'bookings.get_customer' ) }}",             type: "POST",             data: nameArray,             success: function( resp ){                 console.log( resp )             }         }) 

As you can see, I am passing an array against which I will search my mongo database, which will either return or not return a customer.

So, the python def that is responsible for handling this ajax call is:

@bookings.route( '/get_customer', methods=[ 'POST' ] ) def get_customer():     name = {}     for key, value in request.form.items():      name[ key ] = value      customer_obj = customer_class.Customer()     results = customer_obj.search_customer( name )      return results     

For argument's sake, lets say the customer_obj call returns the following list:

[{'customer': {                u'first_name': u'Dave',                 u'tel': u'0121212121458',                 u'country': u'UK',                     u'address2': u'Townington',                 u'address3': u'Cityville',                 u'email': u'[email protected]',                 u'postcode': u'A10 5BC',                 u'address1': u'10 High Street',                 u'second_name': u'Smith'              },   'customer_id': u'DaveSmithA10 5BCCat_Vegas1346244086' }] 

When I try to return this to the ajax call as

return results 

I get the following error:

 TypeError: 'list' object is not callable 

Here is the traceback:

Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1701, in __call__ return self.wsgi_app(environ, start_response) File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1689, in wsgi_app response = self.make_response(self.handle_exception(e)) File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1687, in wsgi_app response = self.full_dispatch_request() File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1361, in full_dispatch_request response = self.make_response(rv) File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1450, in make_response rv = self.response_class.force_type(rv, request.environ) File "/usr/local/lib/python2.7/dist-packages/werkzeug/wrappers.py", line 711, in force_type response = BaseResponse(*_run_wsgi_app(response, environ)) File "/usr/local/lib/python2.7/dist-packages/werkzeug/test.py", line 818, in run_wsgi_app app_iter = app(environ, start_response) TypeError: 'list' object is not callable 

Does anyone have any suggestions?

Thanks

Answer 1

Flask doesn't expect that you will return list object from your view function. Try jsonify it before:

from flask import jsonify  @bookings.route( '/get_customer', methods=[ 'POST' ] ) def get_customer():     name = {}     for key, value in request.form.items():         name[ key ] = value      customer_obj = customer_class.Customer()     results = customer_obj.search_customer( name )      return jsonify(customers=results)