Hi Dave,
Thanks for your reply.
When starting web2py again the DAL tries to create the tables but none of
the tables are being created due to this error.
Using a clean new version of a web2py app the tables are created and are
of type innodb storage engine( as mentioned in the page you sent).
I am still no step further with solving this issue.
Steve
Op woensdag 11 september 2019 10:35:22 UTC+2 schreef Dave S:
>
>
>
> On Tuesday, September 10, 2019 at 2:58:06 PM UTC-7, Steve wrote:
>>
>> Goodevening,
>>
>> I am trying to migrate from Sqite to MySQL.
>> Unfortunatly when restoring the field in the DB tables i get the
>> following error:
>> <class 'gluon.contrib.pymysql.err.IntegrityError'> (1215, u'Cannot add
>> foreign key constraint')
>> location of issue: Field('Insurance',db.insurance,label=T('Insurance')),
>>
>> When i look this up in google .... this could be caused by a Field which
>> has the reuirement= Not NULL but has no Default value set.
>> I tested this but not able to get passed the error.
>>
>> *first table with field in db1.py*
>>
>> db.define_table('insurance',
>>
>> Field('Company',requires=IS_NOT_EMPTY(error_message='cannot be empty!'),
>> label=T('Company')),
>> Field('Insurance_number','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'),
>> label=T('Insurance Number')),
>> Field('Street_name',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'), label=T('Street
>> Name')),
>> Field('House_number','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'), label=T('House
>> Number')),
>> Field('Postal_code','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'),label=T('Postal
>> Code')),
>> Field('City','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'), label=T('City')),
>> Field('Region','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'), label=T('Region')),
>> Field('Country','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'),
>> label=T('Country')),
>> Field('Telephone_number','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'), label=T('Telephone
>> Number')),
>> Field('Mobile','string',
>> requires=IS_NOT_EMPTY(error_message='cannot be empty!'), label=T('Mobile')),
>> Field('Email','string',
>> requires=IS_EMAIL(error_message='invalid email! Please fill in a correct
>> e-mail address.'), label=T('Email')),
>> auth.signature, format='%(Company)s',fake_migrate=True)
>>
>> *Second table which in a db2.py:*
>>
>> db.define_table('client',
>>
>> Field('Debtor_nr',requires=IS_NOT_EMPTY(error_message='cannot be empty!'),
>> label=T('Debtor number')),
>> Field('Insurance',db.insurance,label=T('Insurance')), -->
>> this
>> is where the first issue takes place
>>
>> Where should i add a default value ? to et this issue fixed
>>
>> Hope you can help me with this
>>
>> Steve
>>
>
> This page has different diagnoses than you mention:
> <URL:
> https://www.rathishkumar.in/2016/01/solved-how-to-solve-mysql-error-code.html
> >
>
> There, the issue with NULL is that the foreign key can't be NULL if it is
> part of the child table's primary key.
>
> Another way to get the error is to use a different mysql storage engine
> than innodb.
>
> Yet another way is to not have a unique key in the table, but since you're
> using a model file to describe the parent table, the DAL should have
> handled that, and also made sure that the parent and child agree on what
> the key is.
>
> As a first step, use your mysql console or dbclient to display the schema
> used for the insurance table. (I can't tell you how to do that, because
> I use sqlite and postgres, not mysql, so I know two incantations but they
> probably don't match what you need).
>
> Good luck!
>
> /dps
>
>
>
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