Merge branch 'master' of git://github.com/tomchristie/django-rest-framework

4 files changed, 148 insertions, 4 deletions

diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 49d2a6d5..491aa7ed 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -15,6 +15,7 @@ import warnings
 from django.core import validators
 from django.core.exceptions import ValidationError
 from django.conf import settings
+from django.db.models.fields import BLANK_CHOICE_DASH
 from django import forms
 from django.forms import widgets
 from django.utils.encoding import is_protected_type
@@ -51,7 +52,7 @@ def get_component(obj, attr_name):
     return that attribute on the object.
     """
     if isinstance(obj, dict):
-        val = obj[attr_name]
+        val = obj.get(attr_name)
     else:
         val = getattr(obj, attr_name)
 
@@ -407,6 +408,8 @@ class ChoiceField(WritableField):
     def __init__(self, choices=(), *args, **kwargs):
         super(ChoiceField, self).__init__(*args, **kwargs)
         self.choices = choices
+        if not self.required:
+            self.choices = BLANK_CHOICE_DASH + self.choices
 
     def _get_choices(self):
         return self._choices
diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index 7707de7a..500bb306 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -705,15 +705,14 @@ class ModelSerializer(Serializer):
         Creates a default instance of a basic non-relational field.
         """
         kwargs = {}
-        has_default = model_field.has_default()
 
-        if model_field.null or model_field.blank or has_default:
+        if model_field.null or model_field.blank:
             kwargs['required'] = False
 
         if isinstance(model_field, models.AutoField) or not model_field.editable:
             kwargs['read_only'] = True
 
-        if has_default:
+        if model_field.has_default():
             kwargs['default'] = model_field.get_default()
 
         if issubclass(model_field.__class__, models.TextField):
diff --git a/rest_framework/tests/fields.py b/rest_framework/tests/fields.py
index 5b5ce835..6b1cdfc7 100644
--- a/rest_framework/tests/fields.py
+++ b/rest_framework/tests/fields.py
@@ -659,3 +659,29 @@ class DecimalFieldTest(TestCase):
 
         self.assertFalse(s.is_valid())
         self.assertEqual(s.errors,  {'decimal_field': ['Ensure that there are no more than 4 digits in total.']})
+
+
+class ChoiceFieldTests(TestCase):
+    """
+    Tests for the ChoiceField options generator
+    """
+
+    SAMPLE_CHOICES = [
+        ('red', 'Red'),
+        ('green', 'Green'),
+        ('blue', 'Blue'),
+    ]
+
+    def test_choices_required(self):
+        """
+        Make sure proper choices are rendered if field is required
+        """
+        f = serializers.ChoiceField(required=True, choices=self.SAMPLE_CHOICES)
+        self.assertEqual(f.choices, self.SAMPLE_CHOICES)
+
+    def test_choices_not_required(self):
+        """
+        Make sure proper choices (plus blank) are rendered if the field isn't required
+        """
+        f = serializers.ChoiceField(required=False, choices=self.SAMPLE_CHOICES)
+        self.assertEqual(f.choices, models.fields.BLANK_CHOICE_DASH + self.SAMPLE_CHOICES)
diff --git a/rest_framework/tests/serializer.py b/rest_framework/tests/serializer.py
index 34acbaab..d0a8570c 100644
--- a/rest_framework/tests/serializer.py
+++ b/rest_framework/tests/serializer.py
@@ -1,4 +1,6 @@
 from __future__ import unicode_literals
+from django.db import models
+from django.db.models.fields import BLANK_CHOICE_DASH
 from django.utils.datastructures import MultiValueDict
 from django.test import TestCase
 from rest_framework import serializers
@@ -43,6 +45,17 @@ class CommentSerializer(serializers.Serializer):
         return instance
 
 
+class NamesSerializer(serializers.Serializer):
+    first = serializers.CharField()
+    last = serializers.CharField(required=False, default='')
+    initials = serializers.CharField(required=False, default='')
+
+
+class PersonIdentifierSerializer(serializers.Serializer):
+    ssn = serializers.CharField()
+    names = NamesSerializer(source='names', required=False)
+
+
 class BookSerializer(serializers.ModelSerializer):
     isbn = serializers.RegexField(regex=r'^[0-9]{13}$', error_messages={'invalid': 'isbn has to be exact 13 numbers'})
 
@@ -153,6 +166,42 @@ class BasicTests(TestCase):
         self.assertFalse(serializer.object is expected)
         self.assertEqual(serializer.data['sub_comment'], 'And Merry Christmas!')
 
+    def test_create_nested(self):
+        """Test a serializer with nested data."""
+        names = {'first': 'John', 'last': 'Doe', 'initials': 'jd'}
+        data = {'ssn': '1234567890', 'names': names}
+        serializer = PersonIdentifierSerializer(data=data)
+
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(serializer.object, data)
+        self.assertFalse(serializer.object is data)
+        self.assertEqual(serializer.data['names'], names)
+
+    def test_create_partial_nested(self):
+        """Test a serializer with nested data which has missing fields."""
+        names = {'first': 'John'}
+        data = {'ssn': '1234567890', 'names': names}
+        serializer = PersonIdentifierSerializer(data=data)
+
+        expected_names = {'first': 'John', 'last': '', 'initials': ''}
+        data['names'] = expected_names
+
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(serializer.object, data)
+        self.assertFalse(serializer.object is expected_names)
+        self.assertEqual(serializer.data['names'], expected_names)
+
+    def test_null_nested(self):
+        """Test a serializer with a nonexistent nested field"""
+        data = {'ssn': '1234567890'}
+        serializer = PersonIdentifierSerializer(data=data)
+
+        self.assertEqual(serializer.is_valid(), True)
+        self.assertEqual(serializer.object, data)
+        self.assertFalse(serializer.object is data)
+        expected = {'ssn': '1234567890', 'names': None}
+        self.assertEqual(serializer.data, expected)
+
     def test_update(self):
         serializer = CommentSerializer(self.comment, data=self.data)
         expected = self.comment
@@ -1001,6 +1050,73 @@ class SerializerPickleTests(TestCase):
         repr(pickle.loads(pickle.dumps(data, 0)))
 
 
+# test for issue #725
+class SeveralChoicesModel(models.Model):
+    color = models.CharField(
+        max_length=10,
+        choices=[('red', 'Red'), ('green', 'Green'), ('blue', 'Blue')],
+        blank=False
+    )
+    drink = models.CharField(
+        max_length=10,
+        choices=[('beer', 'Beer'), ('wine', 'Wine'), ('cider', 'Cider')],
+        blank=False,
+        default='beer'
+    )
+    os = models.CharField(
+        max_length=10,
+        choices=[('linux', 'Linux'), ('osx', 'OSX'), ('windows', 'Windows')],
+        blank=True
+    )
+    music_genre = models.CharField(
+        max_length=10,
+        choices=[('rock', 'Rock'), ('metal', 'Metal'), ('grunge', 'Grunge')],
+        blank=True,
+        default='metal'
+    )
+
+
+class SerializerChoiceFields(TestCase):
+
+    def setUp(self):
+        super(SerializerChoiceFields, self).setUp()
+
+        class SeveralChoicesSerializer(serializers.ModelSerializer):
+            class Meta:
+                model = SeveralChoicesModel
+                fields = ('color', 'drink', 'os', 'music_genre')
+
+        self.several_choices_serializer = SeveralChoicesSerializer
+
+    def test_choices_blank_false_not_default(self):
+        serializer = self.several_choices_serializer()
+        self.assertEqual(
+            serializer.fields['color'].choices,
+            [('red', 'Red'), ('green', 'Green'), ('blue', 'Blue')]
+        )
+
+    def test_choices_blank_false_with_default(self):
+        serializer = self.several_choices_serializer()
+        self.assertEqual(
+            serializer.fields['drink'].choices,
+            [('beer', 'Beer'), ('wine', 'Wine'), ('cider', 'Cider')]
+        )
+
+    def test_choices_blank_true_not_default(self):
+        serializer = self.several_choices_serializer()
+        self.assertEqual(
+            serializer.fields['os'].choices,
+            BLANK_CHOICE_DASH + [('linux', 'Linux'), ('osx', 'OSX'), ('windows', 'Windows')]
+        )
+
+    def test_choices_blank_true_with_default(self):
+        serializer = self.several_choices_serializer()
+        self.assertEqual(
+            serializer.fields['music_genre'].choices,
+            BLANK_CHOICE_DASH + [('rock', 'Rock'), ('metal', 'Metal'), ('grunge', 'Grunge')]
+        )
+
+
 class DepthTest(TestCase):
     def test_implicit_nesting(self):