newforms: Added initial implementation of form_for_model and form_for_fields

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4205 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/fields/__init__.py

@@ -333,6 +333,12 @@ class Field(object):
             return self._choices
     choices = property(_get_choices)
 
+    def formfield(self):
+        "Returns a django.newforms.Field instance for this database Field."
+        from django.newforms import CharField
+        # TODO: This is just a temporary default during development.
+        return CharField(label=capfirst(self.verbose_name))
+
 class AutoField(Field):
     empty_strings_allowed = False
     def __init__(self, *args, **kwargs):

django/newforms/models.py

@@ -1,13 +1,19 @@
 """
-Helper functions for creating Forms from Django models and database field objects.
+Helper functions for creating Form classes from Django models
+and database field objects.
 """
 
+from forms import BaseForm, DeclarativeFieldsMetaclass, SortedDictFromList
+
 __all__ = ('form_for_model', 'form_for_fields')
 
 def form_for_model(model):
-    "Returns a Form instance for the given Django model class."
-    raise NotImplementedError
+    "Returns a Form class for the given Django model class."
+    opts = model._meta
+    fields = SortedDictFromList([(f.name, f.formfield()) for f in opts.fields + opts.many_to_many])
+    return type(opts.object_name + 'Form', (BaseForm,), {'fields': fields, '_model_opts': opts})
 
 def form_for_fields(field_list):
-    "Returns a Form instance for the given list of Django database field instances."
-    raise NotImplementedError
+    "Returns a Form class for the given list of Django database field instances."
+    fields = SortedDictFromList([(f.name, f.formfield()) for f in field_list])
+    return type('FormForFields', (BaseForm,), {'fields': fields})

tests/modeltests/model_forms/models.py

@@ -0,0 +1,44 @@
+"""
+34. Generating HTML forms from models
+
+Django provides shortcuts for creating Form objects from a model class.
+"""
+
+from django.db import models
+
+class Category(models.Model):
+    name = models.CharField(maxlength=20)
+    url = models.CharField('The URL', maxlength=20)
+
+    def __str__(self):
+        return self.name
+
+class Article(models.Model):
+    headline = models.CharField(maxlength=50)
+    pub_date = models.DateTimeField()
+    categories = models.ManyToManyField(Category)
+
+    def __str__(self):
+        return self.headline
+
+__test__ = {'API_TESTS': """
+>>> from django.newforms import form_for_model
+>>> CategoryForm = form_for_model(Category)
+>>> f = CategoryForm()
+>>> print f
+<tr><th><label for="id_id">ID:</label></th><td><input type="text" name="id" id="id_id" /></td></tr>
+<tr><th><label for="id_name">Name:</label></th><td><input type="text" name="name" id="id_name" /></td></tr>
+<tr><th><label for="id_url">The URL:</label></th><td><input type="text" name="url" id="id_url" /></td></tr>
+>>> print f.as_ul()
+<li><label for="id_id">ID:</label> <input type="text" name="id" id="id_id" /></li>
+<li><label for="id_name">Name:</label> <input type="text" name="name" id="id_name" /></li>
+<li><label for="id_url">The URL:</label> <input type="text" name="url" id="id_url" /></li>
+>>> print f['name']
+<input type="text" name="name" id="id_name" />
+
+>>> f = CategoryForm(auto_id=False)
+>>> print f.as_ul()
+<li>ID: <input type="text" name="id" /></li>
+<li>Name: <input type="text" name="name" /></li>
+<li>The URL: <input type="text" name="url" /></li>
+"""}