69 lines
2.3 KiB
Python
69 lines
2.3 KiB
Python
from django.db import models
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from django.utils.translation import ugettext
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class ModelAttribute(object):
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__registry = {}
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@classmethod
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def get_for(cls, model, type_names=None):
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result = []
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try:
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for type_name, attributes in cls.__registry[model].iteritems():
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if not type_names or type_name in type_names:
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result.extend(attributes)
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return result
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except IndexError:
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# We were passed a model instance, try again using the model of the
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# instance
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# If we are already in the model class, exit with an error
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if model.__class__ == models.base.ModelBase:
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raise
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return cls.get_for[type(model)]
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@classmethod
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def get_choices_for(cls, model, type_names=None):
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return [(attribute.name, attribute) for attribute in cls.get_for(model, type_names)]
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@classmethod
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def help_text_for(cls, model, type_names=None):
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result = []
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for count, attribute in enumerate(cls.get_for(model, type_names), 1):
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result.append('{}) {}'.format(count, unicode(attribute.get_display(show_name=True))))
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return ' '.join([ugettext('Available attributes: '), ', '.join(result)])
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def get_display(self, show_name=False):
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if self.description:
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return u'{} - {}'.format(self.name if show_name else self.label, self.description)
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else:
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return unicode(self.name if show_name else self.label)
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def __unicode__(self):
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return self.get_display()
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def __init__(self, model, name, label=None, description=None, type_name=None):
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self.model = model
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self.label = label
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self.name = name
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self.description = description
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for field in model._meta.fields:
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if field.name == name:
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self.label = field.verbose_name
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self.description = field.help_text
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self.__registry.setdefault(model, {})
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if isinstance(type_name, list):
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for single_type in type_name:
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self.__registry[model].setdefault(single_type, [])
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self.__registry[model][single_type].append(self)
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else:
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self.__registry[model].setdefault(type_name, [])
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self.__registry[model][type_name].append(self)
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