86 lines
2.3 KiB
Python
86 lines
2.3 KiB
Python
"""
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Defines the models that that Django application uses
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"""
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from django.db import models
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class CommonInfo(models.Model):
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"""
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Common base class for models that need a name and active field. It is
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intended to be an abstract class.
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"""
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name = models.CharField(max_length=100)
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active = models.BooleanField(default=True)
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def __unicode__(self):
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return self.name
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class Meta:
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"""
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Declare the class as abstract
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"""
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abstract = True
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class Category(CommonInfo):
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"""
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Contains the details for a category of samples. Categories have a parent
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category field to another category which creates a tree structure.
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"""
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parent = models.ForeignKey('self', blank=True, null=True,
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on_delete=models.SET_NULL,
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related_name='children')
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class Sample(CommonInfo):
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"""
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The definition of a model itself. The model_filename is the path relative
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to the models directory.
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"""
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model_filename = models.CharField(max_length=1000)
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description = models.CharField(max_length=2000, default='', blank=True,
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null=True)
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parent = models.ForeignKey(Category, blank=True, null=True,
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on_delete=models.SET_NULL,
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related_name="samples")
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class Question(models.Model):
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"""
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The definition of a multiple choice question, associated with a Sample
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"""
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text = models.CharField(max_length=2000)
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sample = models.ForeignKey(Sample, related_name='questions')
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def correct_answers(self):
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"""
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Return a list of correct answers to the question
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"""
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return self.answers.filter(correct=True)
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def check_answer(self, answerid):
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"""
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Check if answerid is correct. Returns True if correct, else False
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"""
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for answer in self.correct_answers():
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if answer.id == int(answerid):
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return True
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return False
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def __unicode__(self):
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return self.text
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class Answer(models.Model):
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"""
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The definition of an answer to a Question
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"""
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text = models.CharField(max_length=2000)
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correct = models.BooleanField(default=False)
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question = models.ForeignKey(Question, related_name='answers')
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def __unicode__(self):
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return self.text
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