Add HTML Attributes in Model
Maybe there is a better solution, feedback welcome!
- form_for_model
- modelform
Snippet List
Add validation for 'unique' and 'unique_together' constraints to newforms created dynamically via form_for_model or form_for_instance
This snippet provides a form_for_model and form_for_instance function which create newforms that respect the unique and unique_together constraints defined in the model. One thing about the coding style in this code snippet: Classes are capitalized even if they're passed as arguments. Thus "Model" is a model class while "model" is a model instance.
- newforms
- form_for_model
- form_for_instance
- unique_together
- unique
- formfield_factory
form_for_model / instance customized save and model aware validation
A way to make form_for_model more customizable.
- form_for_model
- form_for_instance
- model
- form
- baseform
Modify fields created by form_for_model
Using newforms you can create forms from existing models easily and automatically with either `form_for_model(class)` or `form_for_instance(instance)`. Usually the automagically generated form fields are sufficient; however, sometimes you need to restrict selections in a choice field. You can also set the default selection when instantiating the form. In this example, if `acct` is not contained in the 'account' field choices, the selection defaults to the first entry. This example is probably not good practice when using `form_for_instance` because the existing value 'selection' of the choice field is lost and must be reset manually (see above).
- newforms
- foreignkey
- dropdown
- choicefield
- form_for_model
- form_for_instance
4 snippets posted so far.