def resolved_model(self, data, model, cls):
"""
Does all the initialization that had to wait until we knew which
model we depend on.
"""
self.other_model = model
# Create a list of all ForeignKeys and ManyToManyFields between both related models, in both directions
candidates = [('forward',fk) for fk in find_fks(self.this_model,self.other_model,self.fk_name)]
candidates += [('backward',fk) for fk in find_fks(self.other_model,self.this_model,self.fk_name)]
candidates += [('forward_m2m',fk) for fk in find_m2ms(self.this_model,self.other_model,self.fk_name)]
candidates += [('backward_m2m',fk) for fk in find_m2ms(self.other_model,self.this_model,self.fk_name)]
# If a relation type was given (forward,backward,forward_m2m or backward_m2m),
# filter out all relations that do not match this type.
candidates = [x for x in candidates if not self.type or self.type == x[0]]
if len(candidates) > 1:
raise ValueError("%s has more than one ForeignKey or ManyToManyField to %s (or reverse); cannot auto-resolve."
% (self.this_model, self.other_model))
if not candidates:
raise ValueError("%s has no ForeignKeys or ManyToManyFields to %s (or reverse); cannot auto-resolve."
% (self.this_model, self.other_model))
# Now the candidates list contains exactly one item, thats our winner.
self.type, self.field = candidates[0]
def resolved_model(self, data, model, cls):
"""
Does all the initialization that had to wait until we knew which
model we depend on.
"""
self.other_model = model
# Create a list of all ForeignKeys and ManyToManyFields between both related models, in both directions
candidates = [('forward',fk) for fk in find_fks(self.this_model,self.other_model,self.fk_name)]
candidates += [('backward',fk) for fk in find_fks(self.other_model,self.this_model,self.fk_name)]
candidates += [('forward_m2m',fk) for fk in find_m2ms(self.this_model,self.other_model,self.fk_name)]
candidates += [('backward_m2m',fk) for fk in find_m2ms(self.other_model,self.this_model,self.fk_name)]
# If a relation type was given (forward,backward,forward_m2m or backward_m2m),
# filter out all relations that do not match this type.
candidates = [x for x in candidates if not self.type or self.type == x[0]]
if len(candidates) > 1:
raise ValueError("%s has more than one ForeignKey or ManyToManyField to %s (or reverse); cannot auto-resolve."
% (self.this_model, self.other_model))
if not candidates:
raise ValueError("%s has no ForeignKeys or ManyToManyFields to %s (or reverse); cannot auto-resolve."
% (self.this_model, self.other_model))
# Now the candidates list contains exactly one item, thats our winner.
self.type, self.field = candidates[0]