Question

having this two classes I always have a doubt of which is the best practice “linking” them ( if any)

Question

class Question(models.Model):
    text = models.CharField('Question',max_length=120)
    created = models.DateTimeField(auto_now_add=True)
    opens = models.DateTimeField()
    closes = models.DateTimeField()

Answer

class Answer(models.Model):
    text =  models.CharField('Answer',max_length=120)
    votes = models.IntegerField(default=0)

Wrong – I can add this line to Answer (this was a copy / paste error):

answers = models.ForeignKey(Answer)

Edit:

answers = models.ManyToManyField(Answer)

I can add this line to Answer:

question = models.ForeignKey(Question)

I would like to know if it really doesn’t matter or I should consider different aspects.

Thanks!

Answer 1

class Question: 
    answer = models.ForeignKey(Answer)

“This particular question has only one possible answer”.

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class Answer: 
    question = models.ForeignKey(Question)

“This answer belongs to one particular question only, but that question might have multiple separate answers”

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class Answer:
    question = models.ManyToManyField(Question)

“This particular answer is an answer to multiple questions. So questions can have multiple separate answers”

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class Question:
    answers = modes.ManyToManyField(Answer)

“This question has multiple distinct answers. Also answers can belong to multiple questions.” [Best approach]

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An question has to have answers. You don’t make an answer (usually) to answer multiple questions, instead, an answer answers one particular question, but there may be multiple answers (from different users for example). Therefore I’d pick 4 .