Merge branch 'html_cutoff_settings' of https://github.com/MobileWorks/django-rest-framework into MobileWorks-html_cutoff_settings

docs/api-guide/relations.md

@@ -457,6 +457,8 @@ There are two keyword arguments you can use to control this behavior:
 - `html_cutoff` - If set this will be the maximum number of choices that will be displayed by a HTML select drop down. Set to `None` to disable any limiting. Defaults to `1000`.
 - `html_cutoff_text` - If set this will display a textual indicator if the maximum number of items have been cutoff in an HTML select drop down. Defaults to `"More than {count} items…"`
 
+You can also control these globally using the settings `HTML_SELECT_CUTOFF` and `HTML_SELECT_CUTOFF_TEXT`.
+
 In cases where the cutoff is being enforced you may want to instead use a plain input field in the HTML form. You can do so using the `style` keyword argument. For example:
 
     assigned_to = serializers.SlugRelatedField(

docs/api-guide/settings.md

@@ -382,6 +382,22 @@ This should be a function with the following signature:
 
 Default: `'rest_framework.views.get_view_description'`
 
+## HTML Select Field cutoffs
+
+Global settings for [select field cutoffs for rendering relational fields](relations.md#select-field-cutoffs) in the browsable API.
+
+#### HTML_SELECT_CUTOFF
+
+Global setting for the `html_cutoff` value.  Must be an integer.
+
+Default: 1000
+
+#### HTML_SELECT_CUTOFF_TEXT
+
+A string representing a global setting for `html_cutoff_text`.
+
+Default: `"More than {count} items..."`
+
 ---
 
 ## Miscellaneous settings

rest_framework/relations.py

@@ -18,6 +18,7 @@ from rest_framework.fields import (
     Field, empty, get_attribute, is_simple_callable, iter_options
 )
 from rest_framework.reverse import reverse
+from rest_framework.settings import api_settings
 from rest_framework.utils import html
 
 
@@ -71,14 +72,19 @@ MANY_RELATION_KWARGS = (
 
 class RelatedField(Field):
     queryset = None
-    html_cutoff = 1000
-    html_cutoff_text = _('More than {count} items...')
+    html_cutoff = None
+    html_cutoff_text = None
 
     def __init__(self, **kwargs):
         self.queryset = kwargs.pop('queryset', self.queryset)
-        self.html_cutoff = kwargs.pop('html_cutoff', self.html_cutoff)
-        self.html_cutoff_text = kwargs.pop('html_cutoff_text', self.html_cutoff_text)
-
+        self.html_cutoff = kwargs.pop(
+            'html_cutoff',
+            self.html_cutoff or int(api_settings.HTML_SELECT_CUTOFF)
+        )
+        self.html_cutoff_text = kwargs.pop(
+            'html_cutoff_text',
+            self.html_cutoff_text or _(api_settings.HTML_SELECT_CUTOFF_TEXT)
+        )
         if not method_overridden('get_queryset', RelatedField, self):
             assert self.queryset is not None or kwargs.get('read_only', None), (
                 'Relational field must provide a `queryset` argument, '
@@ -447,15 +453,20 @@ class ManyRelatedField(Field):
         'not_a_list': _('Expected a list of items but got type "{input_type}".'),
         'empty': _('This list may not be empty.')
     }
-    html_cutoff = 1000
-    html_cutoff_text = _('More than {count} items...')
+    html_cutoff = None
+    html_cutoff_text = None
 
     def __init__(self, child_relation=None, *args, **kwargs):
         self.child_relation = child_relation
         self.allow_empty = kwargs.pop('allow_empty', True)
-        self.html_cutoff = kwargs.pop('html_cutoff', self.html_cutoff)
-        self.html_cutoff_text = kwargs.pop('html_cutoff_text', self.html_cutoff_text)
-
+        self.html_cutoff = kwargs.pop(
+            'html_cutoff',
+            self.html_cutoff or int(api_settings.HTML_SELECT_CUTOFF)
+        )
+        self.html_cutoff_text = kwargs.pop(
+            'html_cutoff_text',
+            self.html_cutoff_text or _(api_settings.HTML_SELECT_CUTOFF_TEXT)
+        )
         assert child_relation is not None, '`child_relation` is a required argument.'
         super(ManyRelatedField, self).__init__(*args, **kwargs)
         self.child_relation.bind(field_name='', parent=self)

rest_framework/settings.py

@@ -111,6 +111,10 @@ DEFAULTS = {
     'COMPACT_JSON': True,
     'COERCE_DECIMAL_TO_STRING': True,
     'UPLOADED_FILES_USE_URL': True,
+
+    # Browseable API
+    'HTML_SELECT_CUTOFF': 1000,
+    'HTML_SELECT_CUTOFF_TEXT': "More than {count} items...",
 }