orm - Use a model's field as an identifier -



orm - Use a model's field as an identifier -

i have next model in openerp 7. how indicate isbn field should primary key.

class="lang-py prettyprint-override">from osv import osv, fields class book(osv.model): """ book """ _name = 'helloworld.book' _columns = { 'isbn' : fields.char('isbn', size=9, requried=true), 'title' : fields.char('title', size=100, required=true), 'genre' : fields.char('genre', size=20, required=true), }

a primary key special relational database table column (or combination of columns) designated uniquely identify table records.

a primary key’s main features are:

it must contain unique value each row of data.

it cannot contain null values.

a primary key either existing table column or column generated database according defined sequence.

openerp supports keeping unique sql constraint on field.

_sql_constraints = [ ('my_key_value', 'unique(key_value1,key_value2)', 'key value has unique !') ]

in case, have chosen char type of field, set sql constraint this.add class. , restart server , check again. find primary key's functionality on 'isbn' field.

_sql_constraints = [ ('isbn_uniq', 'unique(isbn)', 'isbn must unique!'), ]

for case insensitive constraints,

def _check_unique_insesitive(self, cr, uid, ids, context=none): sr_ids = self.search(cr, uid ,[], context=context) lst = [x.ibsn.lower() x in self.browse(cr, uid, sr_ids, context=context) if x.ibsn] self_obj in self.browse(cr, uid, ids, context=context): if self_obj.ibsn , self_obj.ibsn.lower() in lst: homecoming false homecoming true _constraints = [(_check_unique_insesitive, 'error: isbn must unique!', ['ibsn'])]

hope help you. :)

orm openerp-7

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