Hie ,

i am a new developer from Zimbabwe and the logic i used for my add to cart 
is giving me an error how can i handle this?

MODEL CODE:


db.define_table('products',
    Field('product_name'),
    Field('current_price', 'float'),
    Field('image', 'upload'),
    Field('description', type='text'),
    Field('product_availability', requires = IS_IN_SET(['Available','Not 
Available'])),
    auth.signature,
    )

db.define_table('orders',
    Field('productId', db.product),
    Field('userId', db.auth_user),
    Field('qty'),                            
    Field('order_date'),
     )

CONTROLLER CODE

def proc():
    prodDict = {}
    productrows = db(db.products).select()
    for x in productrows:
        prodDict[x.id] = x.product_name
    order_date = str(request.now.year) + "-" + str(request.now.month) + "-" 
+ str(request.now.day)
    qty = request.vars.qty
    productId = request.vars.productId
    userId = session.auth.user.id
    sql = "INSERT INTO orders (productId, userId, qty, order_date) values 
(str(productId), str(userId), str(qty), str(order_date))"
    #sql = sql + "(" + str(productId) + "," + str(userId) + "," + str(qty) 
+  "," + str(order_date) + "')"
    r = db.executesql(sql)
    rows = 
db(db.orders.userId==session.auth.user.id).select(orderby=~db.orders.id)
    return locals()

VIEWCODE

{{extend 'layout.html'}}
<h1>Shopping Cart</h1>
<p>
    Items in Cart
</p>
<table class='table table-striped table-hover'>
    {{for x in rows:}}
    <tr>
        <td>{{x.qty}}</td>
        <td>{{=prodDict[x.id]}}</td>
        <td><a href='#delete'>Delete</a></td>        
    </tr>
    {{pass}}
</table>
<br/>
&nbsp;&nbsp;&nbsp;<a href='view'>Continue Ordering</a>

PLEASE ASSIST .....the add to cart button is there on my main page but when 
i add something to cart it gives me a error below

Traceback 

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Traceback (most recent call last):
  File "C:\Users\elisha.bere\Downloads\my_python_files\PIZZZA 
PROJECT\web2py_win\web2py\gluon\restricted.py", line 219, in restricted
    exec(ccode, environment)
  File "C:/Users/elisha.bere/Downloads/my_python_files/PIZZZA 
PROJECT/web2py_win/web2py/applications/project/controllers/products.py" 
<http://127.0.0.1:8000/admin/default/edit/project/controllers/products.py>, 
line 58, in <module>
  File "C:\Users\elisha.bere\Downloads\my_python_files\PIZZZA 
PROJECT\web2py_win\web2py\gluon\globals.py", line 419, in <lambda>
    self._caller = lambda f: f()
  File "C:/Users/elisha.bere/Downloads/my_python_files/PIZZZA 
PROJECT/web2py_win/web2py/applications/project/controllers/products.py" 
<http://127.0.0.1:8000/admin/default/edit/project/controllers/products.py>, 
line 50, in proc
    r = db.executesql(sql)
  File "C:\Users\elisha.bere\Downloads\my_python_files\PIZZZA 
PROJECT\web2py_win\web2py\gluon\packages\dal\pydal\base.py", line 768, in 
executesql
    adapter.execute(query)
  File "C:\Users\elisha.bere\Downloads\my_python_files\PIZZZA 
PROJECT\web2py_win\web2py\gluon\packages\dal\pydal\adapters\__init__.py", line 
67, in wrap
    return f(*args, **kwargs)
  File "C:\Users\elisha.bere\Downloads\my_python_files\PIZZZA 
PROJECT\web2py_win\web2py\gluon\packages\dal\pydal\adapters\base.py", line 412, 
in execute
    rv = self.cursor.execute(command, *args[1:], **kwargs)
OperationalError: no such column: productId

Error snapshot [image: help] 
<http://127.0.0.1:8000/admin/default/ticket/project/127.0.0.1.2018-06-04.16-26-14.cccf8530-dc40-4060-b792-ebd9a3b014e2#>
 

<class 'sqlite3.OperationalError'>(no such column: productId) 

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