models.py
class KeySkills(models.Model):
skills = models.TextField()
versions = models.DecimalField(decimal_places=3,null=True,blank=True,max_digits=10,default=None)
experience = models.DecimalField(decimal_places=3,null=True,blank=True,max_digits=10,default=None)
user = models.ForeignKey(access_models.SeekerRegister,on_delete=models.CASCADE,related_name='key_skills',null=True,blank=True)
def __str__(self):
return "KeySkills"
query:
KeySkills.objects.filter(skills__unaccent__icontains='python')
KeySkills.objects.filter(skills_text__search='python')
error:
File "<console>", line 1, in <module>
File "/usr/local/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 844, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django/db/models/query.py", line 862, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1263, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1287, in _add_q
split_subq=split_subq,
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1225, in build_filter
condition = self.build_lookup(lookups, col, value)
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1080, in build_lookup
lhs = self.try_transform(lhs, name)
File "/usr/local/lib/python3.6/site-packages/django/db/models/sql/query.py", line 1126, in try_transform
(name, lhs.output_field.__class__.__name__))
django.core.exceptions.FieldError: Unsupported lookup 'unaccent' for TextField or join on the field not permitted.
Here i am trying to search using django ORM queries.
And tring using above two way of queries but i am getting above error .
Please have a look into my code.
You need to add 'django.contrib.postgres' in your INSTALLED_APPS
Also, try this link
You need to add 'django.contrib.postgres' in your INSTALLED_APPS:
and after that you need install the extension 'unaccent' to you database to do this execute tha query:
CREATE EXTENSION unaccent;
i did this inside pgadmin4 in execute query.
Related
I have a model with a custom string for an id.
class BaseModel(Model):
id = CharField(
max_length=23,
auto_created=True,
primary_key=True,
serialize=False,
verbose_name="ID",
default=generate,
editable=False,
)
When deleting, I am getting this error.
Internal Server Error: /admin/sampleapp/user/
Traceback (most recent call last):
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\fields\__init__.py", line 1988, in get_prep_value
return int(value)
ValueError: invalid literal for int() with base 10: 'AC7EEKrEhYZ9p1r-Q'
The above exception was the direct cause of the following exception:
response = func(self, request, queryset)
File "path\to\sampleapp\venv\lib\site-packages\django\contrib\admin\actions.py", line 39, in delete_selected
) = modeladmin.get_deleted_objects(queryset, request)
File "path\to\sampleapp\venv\lib\site-packages\django\contrib\admin\options.py", line 2099, in get_deleted_objects
return get_deleted_objects(objs, request, self.admin_site)
File "path\to\sampleapp\venv\lib\site-packages\django\contrib\admin\utils.py", line 120, in get_deleted_objects
collector.collect(objs)
File "path\to\sampleapp\venv\lib\site-packages\django\contrib\admin\utils.py", line 186, in collect
return super().collect(objs, source_attr=source_attr, **kwargs)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\deletion.py", line 343, in collect
field.remote_field.on_delete(self, field, sub_objs, self.using)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\deletion.py", line 23, in CASCADE
collector.collect(
File "path\to\sampleapp\venv\lib\site-packages\django\contrib\admin\utils.py", line 186, in collect
return super().collect(objs, source_attr=source_attr, **kwargs)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\deletion.py", line 365, in collect
sub_objs = field.bulk_related_objects(new_objs, self.using)
File "path\to\sampleapp\venv\lib\site-packages\django\contrib\contenttypes\fields.py", line 524, in bulk_related_objects
return self.remote_field.model._base_manager.db_manager(using).filter(
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\query.py", line 1071, in filter
return self._filter_or_exclude(False, args, kwargs)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\query.py", line 1089, in _filter_or_exclude
clone._filter_or_exclude_inplace(negate, args, kwargs)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\query.py", line 1096, in _filter_or_exclude_inplace
self._query.add_q(Q(*args, **kwargs))
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\sql\query.py", line 1502, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\sql\query.py", line 1532, in _add_q
child_clause, needed_inner = self.build_filter(
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\sql\query.py", line 1448, in build_filter
condition = self.build_lookup(lookups, col, value)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\sql\query.py", line 1273, in build_lookup
lookup = lookup_class(lhs, rhs)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\lookups.py", line 27, in __init__
self.rhs = self.get_prep_lookup()
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\lookups.py", line 276, in get_prep_lookup
rhs_value = self.lhs.output_field.get_prep_value(rhs_value)
File "path\to\sampleapp\venv\lib\site-packages\django\db\models\fields\__init__.py", line 1990, in get_prep_value
raise e.__class__(
ValueError: Field 'object_pk' expected a number but got 'AC7EEKrEhYZ9p1r-Q'.
"POST /admin/sampleapp/user/ HTTP/1.1" 500 213503
Kindly help in solving this issue.
I first noticed this issue when attempting to delete via admin but that didn't work. Upon inspection, I noticed the issue was that the model could not be deleted even via shell.
From your traceback:
ValueError: invalid literal for int() with base 10: 'AC7EEKrEhYZ9p1r-Q'
It's expecting an integer.
Is there a particular reason you want to replace the id field? You could always just create a separate field for your custom one and use that as the id elsewhere in your program
Hello everyone I am trying to get data from database but it give me error in case when I am trying to get single data from db as shown below
wahid = Webapp.objects.get(title="Ecommerce Website")
Traceback (most recent call last):
File "<console>", line 1, in <module>
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 418, in get
clone = self._chain() if self.query.combinator else self.filter(*args, **kwargs)
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 942, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 962, in _filter_or_exclude
clone._filter_or_exclude_inplace(negate, *args, **kwargs)
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\query.py", line 969, in _filter_or_exclude_inplace
self._query.add_q(Q(*args, **kwargs))
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1358, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1377, in _add_q
child_clause, needed_inner = self.build_filter(
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1258, in build_filter
lookups, parts, reffed_expression = self.solve_lookup_type(arg)
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1084, in solve_lookup_type
_, field, _, lookup_parts = self.names_to_path(lookup_splitted, self.get_meta())
File "C:\Users\wahid\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\sql\query.py", line 1481, in names_to_path
raise FieldError("Cannot resolve keyword '%s' into field. "
django.core.exceptions.FieldError: Cannot resolve keyword 'title' into field. Choices are: created, demo_link, description, id, review, source_link, tags, tiltle, vote_ratio, vote_total
It will work only on getting all data from db as shown in image
There is a spelling mistake,
You have created field name "tiltle" in models, however you are trying to fetch "title" in your get query
Also, using get query might throw an error if there are more than one record that have title="Ecommerce Website"
for that you can use
Webapp.objects.filter(title="Ecommerce Website")
you should rename title field in your model, it seems you enter title field name to wrong dictation
'tiltle' must be 'title' in your model
I have a QuerySet and an array of strings that I want to test against the QuerySet.
The problem is the values I want to check are foreignKeys and the important characters of the foreignKey are in the beginning.
The query I thought would work is this:
materials_comparison_list.extend(materials_non_eu.filter(code__code__startswith__in=headings_list))
materials_non_eu is the QuerySet, headings_list is the array
However when running that it returns the following error:
django.core.exceptions.FieldError: Unsupported lookup 'startswith' for CharField or join on the field not permitted, perhaps you meant startswith or istartswith
I tried to change the place or __startswith and __in but that produces the same error (different words)
The models for materials looks like this:
class Materials(models.Model):
id = models.AutoField(primary_key=True)
row = models.IntegerField(null=True)
code = models.ForeignKey('HS_code', on_delete=models.CASCADE, null=True)
...
The model for the code looks like this:
class HS_Code(models.Model):
id = models.AutoField(primary_key=True)
code = models.CharField(max_length=10, unique=False)
....
The complete console output:
Traceback (most recent call last):
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/core/handlers/base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/core/handlers/base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
return view_func(*args, **kwargs)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/views/generic/base.py", line 71, in view
return self.dispatch(request, *args, **kwargs)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/rest_framework/views.py", line 505, in dispatch
response = self.handle_exception(exc)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/rest_framework/views.py", line 465, in handle_exception
self.raise_uncaught_exception(exc)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/rest_framework/views.py", line 476, in raise_uncaught_exception
raise exc
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/rest_framework/views.py", line 502, in dispatch
response = handler(request, *args, **kwargs)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/rest_framework/decorators.py", line 50, in handler
return func(*args, **kwargs)
File "/Users/5knnbdwm/Python_env/FlexOrigin/main/user.py", line 1115, in api_user_summary_v2
print(Calculation_Master(
File "/Users/5knnbdwm/Python_env/FlexOrigin/main/cluster_v2.py", line 60, in Calculation_Master
MAXNOM(session, materials, country, rule_block[1])
File "/Users/5knnbdwm/Python_env/FlexOrigin/main/cluster_v2.py", line 140, in MAXNOM
materials_comparison_list.extend(materials_non_eu.filter(
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/db/models/query.py", line 904, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/db/models/query.py", line 923, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1350, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1377, in _add_q
child_clause, needed_inner = self.build_filter(
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1311, in build_filter
condition = self.build_lookup(lookups, col, value)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1150, in build_lookup
lhs = self.try_transform(lhs, name)
File "/Users/5knnbdwm/Python_env/lib/python3.8/site-packages/django/db/models/sql/query.py", line 1198, in try_transform
raise FieldError(
django.core.exceptions.FieldError: Unsupported lookup 'startswith' for CharField or join on the field not permitted, perhaps you meant startswith or istartswith?
You can not combine the two, but you can make a disjunctive filter with a Q object:
from django.db.models import Q
materials_comparison_list.extend(
materials_non_eu.filter(Q(
*[('code__code__startswith', heading) for heading in headings_list],
_connector=Q.OR
))
)
I am having a Json field in my models as -
class Product(models.Model):
...
detailed_stock = JSONField(load_kwargs={'object_pairs_hook': collections.OrderedDict},default=dict)
I am having values in my database like -
{
"total":0,
"5[1]":0
}
I am trying to filter objects with total = 0, for that I tried -
Product.objects.filter(detailed_stock__total = 0)
but it throws error -
Unsupported lookup 'total' for JSONField or join on the field not permitted.
as per the documentation the following code is permitted.
this is full traceback-
Traceback (most recent call last):
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\core\handlers\exception.py", line 35, in inner
response = get_response(request)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\core\handlers\base.py", line 128, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\core\handlers\base.py", line 126, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\views\generic\base.py", line 69, in view
return self.dispatch(request, *args, **kwargs)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\braces\views\_access.py", line 102, in dispatch
request, *args, **kwargs)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\views\generic\base.py", line 89, in dispatch
return handler(request, *args, **kwargs)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\views\generic\list.py", line 142, in get
self.object_list = self.get_queryset()
File "c:\Users\lenovo\Desktop\My_Django_Stuff\bekaim\accounts\views.py", line 142, in get_queryset
queryset = Product.objects.filter(detailed_stock__total = 0)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\query.py", line 836, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\query.py", line 854, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\sql\query.py", line 1253, in add_q
clause, _ = self._add_q(q_object, self.used_aliases)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\sql\query.py", line 1271, in _add_q
current_negated, allow_joins, split_subq)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\sql\query.py", line 1277, in _add_q
split_subq=split_subq,
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\sql\query.py", line 1215, in build_filter
condition = self.build_lookup(lookups, col, value)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\sql\query.py", line 1069, in build_lookup
lhs = self.try_transform(lhs, name)
File "C:\Users\lenovo\AppData\Local\conda\conda\envs\myDjangoEnv\lib\site-packages\django\db\models\sql\query.py", line 1115, in try_transform
(name, lhs.output_field.__class__.__name__))
django.core.exceptions.FieldError: Unsupported lookup 'total' for JSONField or join on the field not permitted.
[31/Dec/2018 16:13:37] "GET /accounts/product-list/?clean=outofstock HTTP/1.1" 500 150927
I searched on internet but unable to find the solution, please help.
I think you are using django-jsonfield as indicated by load_kwargs={'object_pairs_hook': collections.OrderedDict} instead of django.contrib.postgres.fields.JSONField.
django-jsonfield is for databases which don't offer a native dict type and is based on a simple TextField. When you access the field value using product.detail_stock the internally saved str is converted to dict using json.loads() by the field itself. Hence you can only use operations like icontains and contains for querying that field.
If you are using postgres as a database, you are able to take full advantage of django.contrib.postgres.fields.JSONField as the documentation states. But you have to import the correct JSONfield by using django.contrib.postgres.fields import JSONField.
There is a solution for mysql (package django-mysql) too.
If you are using Django and have used:
from json_field import JSONField
Then you can not benefit the SQL lookup. As mentioned above, JSONField overrides the
TextField only. It validates the JSONformat and dumps as string.
class JSONField(models.TextField):
""" Stores and loads valid JSON objects. """
Instead use
from django.db import models
data = models.JSONField(null=True)
I have the following three models:
class Region(models.Model):
code = models.IntegerField()
class ReportRequest(models.Model):
# a report can include many regions
regions = models.ManyToManyField(Region)
class Office(models.Model):
# an office belongs to one region
region = models.ForeignKey(Region)
basically, many reports can have many regions, and one region can have many offices.
How can I get all offices related to my report's regions in one query?
I can do this with two queries:
region_pks = reportrequest.regions.values_list('id', flat=True)
offices = Office.objects.filter(region_id__in=region_pks)
but I feel there must be a way to do this in just one query.
I know how to do this if this was a chain of objects connected by ForeignKeys, but ManyToManyField confuses me a bit.
update:
this way Office.objects.filter(region__in=reportrequest.regions) doesn't work.
reportrequest = ReportRequest.objects.first()
print(Office.objects.filter(region__in=reportrequest.regions).all())
Traceback (most recent call last):
File "/Users/9999/_projects/declarator/transparency/transparency/scripts/process_report_requests.py", line 22, in <module>
print(Office.objects.filter(region__in=reportrequest.regions).all())
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/manager.py", line 92, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/query.py", line 691, in filter
return self._filter_or_exclude(False, *args, **kwargs)
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/modeltranslation/manager.py", line 338, in _filter_or_exclude
return super(MultilingualQuerySet, self)._filter_or_exclude(negate, *args, **kwargs)
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/query.py", line 709, in _filter_or_exclude
clone.query.add_q(Q(*args, **kwargs))
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1287, in add_q
clause, require_inner = self._add_q(where_part, self.used_aliases)
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1314, in _add_q
current_negated=current_negated, connector=connector)
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1142, in build_filter
value, lookups = self.prepare_lookup_value(value, lookups, can_reuse)
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/sql/query.py", line 1047, in prepare_lookup_value
value = value()
File "/Users/9999/.virtualenvs/transparency/lib/python2.7/site-packages/django/db/models/fields/related.py", line 839, in __call__
manager = getattr(self.model, kwargs.pop('manager'))
KeyError: u'manager'
This
offices = Office.objects.filter(region__in=reportrequest.regions.all())