The problem is that here:

testform = 
SQLFORM(db.products,db(db.products.product_id==request.post_vars.pid).select(), 
fields=['product_id','price','pro_type','tags','category','description']))

the result of a select is a Rows and not a Row. Do you know there is a 
single matching record? In this case:

testform = 
SQLFORM(db.products,db(db.products.product_id==request.post_vars.pid).select().first(),
 fields=['product_id','price','pro_type','tags','category','description']))

or

testform = SQLFORM(db.products, 
db.products(product_id=request.post_vars.pid), 
fields=['product_id','price','pro_type','tags','category','description']))

Mind that the pid of the product you want to edit should not be a POST 
parameter but a GET parameter. According to REST it is used to identify the 
resource you want to edit therefore it belongs to the URL not to the posted 
data.

Massimo



On Wednesday, 2 July 2014 06:05:31 UTC-5, Shubham Jain wrote:
>
> I want to create an update page just like profile page in default 
> application. Actually I am passing the primary key of a table by a button 
> click to the product_update page. In the controller of the update page I 
> tried these 2 codes.
>
> def product_edit():
>     db.products.product_id.writable=FALSE           # to make product_id 
> non editable
>     db.products.product_id.readable=TRUE
>     testform = 
> SQLFORM(db.products,db(db.products.product_id==request.post_vars.pid).select(),
>  fields=['product_id','price','pro_type','tags','category','description']))
>     return dict(form=testform)
>
>           
>  
> --------------OR---------------------------------------------------------------------------------
>
>     dform = 
> SQLFORM(db.products,record=db(db.products.product_id==request.post_vars.pid).select(),
>  
> fields=['product_id','price','pro_type','tags','category','description'])
>     return dict(form=dform)
>
>       pid - name of the input which has the product_id.
> But these don't work.
>
> Error Generated: TypeError: list indices must be integers, not str
>
>

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