def _get_field(model, name):
# Create a fake query object so we can easily work out what field
# type we are dealing with
qs = Query(model)
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 QUERY_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
return qs.names_to_path(parts, qs.get_meta(), True, fail_on_missing=False)[1]
def _get_field(model, name):
# Create a fake query object so we can easily work out what field
# type we are dealing with
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 Query.query_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
qs = Query(model)
return qs.names_to_path(parts, qs.get_meta(), True,
fail_on_missing=False)[1]
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.
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
return resolve_field(qs, parts, opts, alias)
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.
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
return resolve_field(qs, parts, opts, alias)
def follow_model_field_lookup(model, lookup):
"""
Follow a model lookup `foreignkey__foreignkey__field` in the same
way that Django QuerySet.filter() does, returning the final models.Field.
"""
query = Query(model)
lookup_splitted = lookup.split(LOOKUP_SEP)
_, field, _, _ = query.names_to_path(lookup_splitted, query.get_meta())
return field
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
