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Introduce ChoiceSet class for field choices

This commit is contained in:
Jeremy Stretch
2019-11-07 09:32:25 -05:00
parent d392982fe7
commit a2a6b754be
2 changed files with 50 additions and 1 deletions

View File

@ -13,6 +13,7 @@ from rest_framework.response import Response
from rest_framework.serializers import Field, ModelSerializer, ValidationError
from rest_framework.viewsets import ModelViewSet as _ModelViewSet, ViewSet
from utilities.choices import ChoiceSet
from .utils import dict_to_filter_params, dynamic_import
@ -64,14 +65,17 @@ class ChoiceField(Field):
Represent a ChoiceField as {'value': <DB value>, 'label': <string>}.
"""
def __init__(self, choices, **kwargs):
self.choiceset = choices
self._choices = dict()
# Unpack grouped choices
for k, v in choices:
# Unpack grouped choices
if type(v) in [list, tuple]:
for k2, v2 in v:
self._choices[k2] = v2
else:
self._choices[k] = v
super().__init__(**kwargs)
def to_representation(self, obj):
@ -81,6 +85,11 @@ class ChoiceField(Field):
('value', obj),
('label', self._choices[obj])
])
# Include legacy numeric ID (where applicable)
if type(self.choiceset) is ChoiceSet and obj in self.choiceset.LEGACY_MAP:
data['id'] = self.choiceset.LEGACY_MAP.get(obj)
return data
def to_internal_value(self, data):
@ -104,6 +113,10 @@ class ChoiceField(Field):
try:
if data in self._choices:
return data
# Check if data is a legacy numeric ID
slug = self.choiceset.id_to_slug(data)
if slug is not None:
return slug
except TypeError: # Input is an unhashable type
pass