Hello
I have the following in models:
db.define_table('senders',
Field('sender','string',length=80,label="Sender"))
db.define_table('documents',
Field('description','text',requires=IS_LENGTH(256,1),label="Description"),
Field('header_date','date',label="Header Date"),
Field('received_date','date',label="Received Date"),
Field("sent_by",db.senders,label="Sent By",requires=IS_IN_DB(db,
'senders.sender')))
So I want some 'senders', with a description 'sender' and some 'documents'.
Each 'documents' has one 'senders', a 'senders' has many 'documents'.
I added the requres=IS_IN_DB to enable a SQLFORM to provide a drop down
list of SENDERS when I create a new document. This works but ...
We get this:
<class 'sqlite3.IntegrityError'> FOREIGN KEY constraint failed
When we create the DOCUMENT, even though it specifies a SENDER from the
dropdown
Is this because the drop down is senders.sender but the RI constraint is on
senders.id ?
I'm not a fan of surrogate keys, I must say. Traditionally I would have
defined SENDERS as SENDER_CODE, SENDER_NAME and given a meaningful code,
such as
NWAT, Northumbrian Water
instead of
1,Northumbrian Water
which is what I have now.
Anyway, what have I messed up in my model/form, please? I can't see how to
change it to fix this
Form is built with this controller code:
@auth.requires_login()
def newdocument():
form = SQLFORM(db.documents).process()
if form.accepted:
response.flash = 'new record inserted'
dochead = {'documents.description':'Description',
'documents.header_date':'Header Date', 'documents.received_date':'Received
Date', 'documents.sent_by':'Sender',}
# and get a list of all documents
records = SQLTABLE(db().select(db.documents.ALL), truncate=80, headers
= dochead )
return dict(form=form, records=records)
View:
{{extend 'layout.html'}}
<h1>Documents</h1>
{{=form}}
<h2>Current Documents</h2>
{{=records}}
Thanks for any assistance
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