How to filter a referenced field in a for

[Steve]

Hi,

I have a SQLFORM which has 2 fields referenced all to another Product table.

In this form you can select 1 or more products but only first is mandatory, the other one is optional.

The problem i have is that i don't want all the products in the dropdown list but only the products which are for example are in stock, the others i don't want in the list.

For the mandatoy field , i don't have an issue because i use "requires=IS_IN_DB(......."  

But for the other fields, which are not mandatory, i am not able to filter the dropdown list, if i use IS_IN_DB that yoou have to fill in the form field , but as said i would like to leave second product selection optional

Can anyone help me on my way.

db.define_table('werkgroep',

                Field('omschrijving', requires=IS_NOT_EMPTY()),

                Field('product1',requires = IS_IN_DB(db(db.product.stock <> 1), db.product, '%(first_name)s %(last_name)s'), label=T('Product 1')),

                Field('product2',db.product, label=T('Practitioner 2'))

)

db.define_table('product',

                Field('name',requires=IS_NOT_EMPTY()),

                Field('stock', 'integer', requires=IS_NOT_EMPTY()

)

Hope you can help me,

Steve

[Massimiliano]

Try with:

Is_empty_or(is_in_db(...))

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[Steve]

Sorry for my late reply....

That is what i was looking for... thanks

Op woensdag 6 november 2019 21:45:29 UTC+1 schreef Massimiliano:

Try with:

Is_empty_or(is_in_db(...))

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Massimiliano