def save(self):
"""
saves changes on book object, or creates new
m2m changes are handled in BookBorm.save_m2m
returns self.obj
"""
if not self.obj:
self.obj = Book(title=unicode(self.title.data))
else:
self.obj.title = self.title.data
return self.obj
class BookForm(Form):
"""
Form for adding editing Book instances
"""
title = TextField('title', validators=[Required(), Length(min=1, max=256)])
authors = AuthorsTagListField('authors')
def __init__(self, *args, **kwargs):
self.obj = kwargs.get('obj', None)
super(BookForm, self).__init__(*args, **kwargs)
def get_instance(self):
return self.obj
def save(self):
"""
saves changes on book object, or creates new
m2m changes are handled in BookBorm.save_m2m
returns self.obj
"""
if not self.obj:
self.obj = Book(title=unicode(self.title.data))
else:
self.obj.title = self.title.data
return self.obj
def save_m2m(self):
"""
updates authors of book
returns True if there were some actual changes and book object need to
be commited
"""
if self.authors.data:
ids = set(self.authors.data)
return self.obj.update_authors(ids)
return False
