102 lines
2.9 KiB
Python
102 lines
2.9 KiB
Python
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"""
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Helper functions for creating user-friendly representations
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of serializer classes and serializer fields.
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"""
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import re
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from django.db import models
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from django.utils.encoding import force_str
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from django.utils.functional import Promise
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def manager_repr(value):
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model = value.model
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opts = model._meta
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names_and_managers = [
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(manager.name, manager)
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for manager
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in opts.managers
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]
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for manager_name, manager_instance in names_and_managers:
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if manager_instance == value:
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return '%s.%s.all()' % (model._meta.object_name, manager_name)
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return repr(value)
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def smart_repr(value):
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if isinstance(value, models.Manager):
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return manager_repr(value)
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if isinstance(value, Promise) and value._delegate_text:
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value = force_str(value)
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value = repr(value)
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# Representations like u'help text'
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# should simply be presented as 'help text'
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if value.startswith("u'") and value.endswith("'"):
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return value[1:]
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# Representations like
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# <django.core.validators.RegexValidator object at 0x1047af050>
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# Should be presented as
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# <django.core.validators.RegexValidator object>
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return re.sub(' at 0x[0-9A-Fa-f]{4,32}>', '>', value)
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def field_repr(field, force_many=False):
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kwargs = field._kwargs
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if force_many:
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kwargs = kwargs.copy()
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kwargs['many'] = True
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kwargs.pop('child', None)
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arg_string = ', '.join([smart_repr(val) for val in field._args])
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kwarg_string = ', '.join([
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'%s=%s' % (key, smart_repr(val))
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for key, val in sorted(kwargs.items())
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])
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if arg_string and kwarg_string:
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arg_string += ', '
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if force_many:
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class_name = force_many.__class__.__name__
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else:
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class_name = field.__class__.__name__
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return "%s(%s%s)" % (class_name, arg_string, kwarg_string)
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def serializer_repr(serializer, indent, force_many=None):
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ret = field_repr(serializer, force_many) + ':'
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indent_str = ' ' * indent
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if force_many:
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fields = force_many.fields
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else:
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fields = serializer.fields
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for field_name, field in fields.items():
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ret += '\n' + indent_str + field_name + ' = '
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if hasattr(field, 'fields'):
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ret += serializer_repr(field, indent + 1)
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elif hasattr(field, 'child'):
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ret += list_repr(field, indent + 1)
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elif hasattr(field, 'child_relation'):
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ret += field_repr(field.child_relation, force_many=field.child_relation)
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else:
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ret += field_repr(field)
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if serializer.validators:
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ret += '\n' + indent_str + 'class Meta:'
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ret += '\n' + indent_str + ' validators = ' + smart_repr(serializer.validators)
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return ret
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def list_repr(serializer, indent):
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child = serializer.child
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if hasattr(child, 'fields'):
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return serializer_repr(serializer, indent, force_many=child)
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return field_repr(serializer)
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