def _get_field(model, name):
if django.VERSION[0] >= 1 and django.VERSION[1] >= 8:
# Django 1.8+ - can use something like
# expression.output_field.get_internal_field() == 'Money..'
raise NotImplementedError("Django 1.8+ support is not implemented.")
from django.db.models.fields import FieldDoesNotExist
# Create a fake query object so we can easily work out what field
# type we are dealing with
qs = Query(model)
opts = qs.get_meta()
alias = qs.get_initial_alias()
parts = name.split(LOOKUP_SEP)
# The following is borrowed from the innards of Query.add_filter - it strips out __gt, __exact et al.
num_parts = len(parts)
if num_parts > 1 and parts[-1] in qs.query_terms:
# Traverse the lookup query to distinguish related fields from
# lookup types.
lookup_model = model
for counter, field_name in enumerate(parts):
try:
lookup_field = lookup_model._meta.get_field(field_name)
except FieldDoesNotExist:
# Not a field. Bail out.
parts.pop()
break
# Unless we're at the end of the list of lookups, let's attempt
# to continue traversing relations.
if (counter + 1) < num_parts:
try:
lookup_model = lookup_field.rel.to
except AttributeError:
# Not a related field. Bail out.
parts.pop()
break
if django.VERSION[0] >= 1 and django.VERSION[1] in (6, 7):
# Django 1.6-1.7
field = qs.setup_joins(parts, opts, alias)[0]
else:
# Django 1.4-1.5
field = qs.setup_joins(parts, opts, alias, False)[0]
return field
def _get_field(model, name):
from django.db.models.fields import FieldDoesNotExist
# Create a fake query object so we can easily work out what field
# type we are dealing with
qs = Query(model)
opts = qs.get_meta()
alias = qs.get_initial_alias()
parts = name.split(LOOKUP_SEP)
# The following is borrowed from the innards of Query.add_filter - it strips out __gt, __exact et al.
num_parts = len(parts)
if getattr(qs, 'query_terms', None) is not None:
q_terms = qs.query_terms
else:
q_terms = QUERY_TERMS
if num_parts > 1 and parts[-1] in q_terms:
# Traverse the lookup query to distinguish related fields from
# lookup types.
for counter, field_name in enumerate(parts, 1):
try:
lookup_field = model._meta.get_field(field_name)
except FieldDoesNotExist:
# Not a field. Bail out.
parts.pop()
break
# Unless we're at the end of the list of lookups, let's attempt
# to continue traversing relations.
if counter < num_parts:
try:
model = lookup_field.rel.to
except AttributeError:
# Not a related field. Bail out.
parts.pop()
break
if VERSION < (1, 6):
field = qs.setup_joins(parts, opts, alias, False)[0]
else:
field = qs.setup_joins(parts, opts, alias)[0]
return field
def _get_field(model, name):
from django.db.models.fields import FieldDoesNotExist
# Create a fake query object so we can easily work out what field
# type we are dealing with
qs = Query(model)
opts = qs.get_meta()
alias = qs.get_initial_alias()
parts = name.split(LOOKUP_SEP)
# The following is borrowed from the innards of Query.add_filter - it strips out __gt, __exact et al.
num_parts = len(parts)
if num_parts > 1 and parts[-1] in qs.query_terms:
# Traverse the lookup query to distinguish related fields from
# lookup types.
lookup_model = model
for counter, field_name in enumerate(parts):
try:
lookup_field = lookup_model._meta.get_field(field_name)
except FieldDoesNotExist:
# Not a field. Bail out.
parts.pop()
break
# Unless we're at the end of the list of lookups, let's attempt
# to continue traversing relations.
if (counter + 1) < num_parts:
try:
lookup_model = lookup_field.rel.to
except AttributeError:
# Not a related field. Bail out.
parts.pop()
break
if VERSION < (1, 6):
field = qs.setup_joins(parts, opts, alias, False)[0]
else:
field = qs.setup_joins(parts, opts, alias)[0]
return field
