Issue with ManyToMany Relations

I'm writting 2 models with ManyToMany Relations, first I make a model to list all my requirements

class Requirements(models.Model):

requirement = models.CharField(max_length=150)

def __str__(self):

return self.requirement

So in this example my list of requirements will be:

• Personal ID
• Letter from your boss 
• Last degree obtained
  
• Photography
  

Now I make custom list from different scenarios, since not all jobs require the same documents, my model will be: 

class RequirementsList(models.Model):

job= models.ForeignKey(Jobs, on_delete=models.DO_NOTHING)

requirements= models.ManyToManyField(Requirements)

def __str__(self):

return str(self.job)

Now I can pick some of my requeriments and make custom lists from each job or position avaliable.

Last, I make my 3rd model , with a relation between RequirementList and File

class FileDetail(models.Model):

file= models.ForeignKey(File, on_delete=models.DO_NOTHING)

job = models.ForeignKey(Jobs, on_delete=models.DO_NOTHING, blank=True, null=True)

requeriments = models.ManyToManyField(RequirementsList)

def __str__(self):

return self.file

So I need my requirement list to filter what requirements who has to be in my file, but this only give to me in requirements a list of lists instead of requirements in the list.

I been reading the docs and found the "through" parameter but I can't make it work.

Somone has a clue of what I'm doing wrong?

Thanks!

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