The system check framework is a set of static checks for validating Django projects. It detects common problems and provides hints for how to fix them. The framework is extensible so you can easily add your own checks.
For details on how to add your own checks and integrate them with Django's system checks, see the System check topic guide.
CheckMessage¶The warnings and errors raised by system checks must be instances of
CheckMessage. An instance encapsulates a single reportable error or
warning. It also provides context and hints applicable to the message, and a
unique identifier that is used for filtering purposes.
Constructor arguments are:
levelThe severity of the message. Use one of the predefined values: DEBUG,
INFO, WARNING, ERROR, CRITICAL. If the level is greater or
equal to ERROR, then Django will prevent management commands from
executing. Messages with level lower than ERROR (i.e. warnings) are
reported to the console, but can be silenced.
msgA short (less than 80 characters) string describing the problem. The string should not contain newlines.
hintA single-line string providing a hint for fixing the problem. If no hint
can be provided, or the hint is self-evident from the error message, the
hint can be omitted, or a value of None can be used.
objOptional. An object providing context for the message (for example, the
model where the problem was discovered). The object should be a model,
field, or manager or any other object that defines a __str__() method.
The method is used while reporting all messages and its result precedes the
message.
idOptional string. A unique identifier for the issue. Identifiers should
follow the pattern applabel.X001, where X is one of the letters
CEWID, indicating the message severity (C for criticals, E for
errors and so). The number can be allocated by the application, but should
be unique within that application.
There are subclasses to make creating messages with common levels easier. When
using them you can omit the level argument because it is implied by the
class name.
The following checks verify your setup for Asynchronous support:
async.E001: You should not set the DJANGO_ALLOW_ASYNC_UNSAFE
environment variable in deployment. This disables async safety
protection.
Compatibility checks warn of potential problems that might occur after upgrading Django.
2_0.W001: Your URL pattern <pattern> has a route that contains
(?P<, begins with a ^, or ends with a $. This was likely an
oversight when migrating from url() to path().
4_0.E001: As of Django 4.0, the values in the
CSRF_TRUSTED_ORIGINS setting must start with a scheme (usually
http:// or https://) but found <hostname>.
The following checks verify that your CACHES setting is correctly
configured:
caches.E001: You must define a 'default' cache in your
CACHES setting.
caches.W002: Your <cache> configuration might expose your cache or
lead to corruption of your data because its
LOCATION matches/is inside/contains
MEDIA_ROOT/STATIC_ROOT/STATICFILES_DIRS.
caches.W003: Your <cache> cache LOCATION
is relative. Use an absolute path instead.
If you're using MySQL or MariaDB, the following checks will be performed:
mysql.E001: MySQL/MariaDB does not allow unique CharFields to have a
max_length > 255. This check was changed to mysql.W003 in Django
3.1 as the real maximum size depends on many factors.
mysql.W002: MySQL/MariaDB Strict Mode is not set for database connection
<alias>. See also Setting sql_mode.
mysql.W003: MySQL/MariaDB may not allow unique CharFields to have a
max_length > 255.
The following checks verify your setup for Managing files:
files.E001: The FILE_UPLOAD_TEMP_DIR setting refers to the
nonexistent directory <path>.
fields.E001: Field names must not end with an underscore.
fields.E002: Field names must not contain "__".
fields.E003: pk is a reserved word that cannot be used as a field
name.
fields.E004: choices must be a mapping (e.g. a dictionary) or an
iterable (e.g. a list or tuple).
fields.E005: choices must be a mapping of actual values to human
readable names or an iterable containing (actual value, human readable
name) tuples.
fields.E006: db_index must be None, True or False.
fields.E007: Primary keys must not have null=True.
fields.E008: All validators must be callable.
fields.E009: max_length is too small to fit the longest value in
choices (<count> characters).
fields.E010: <field> default should be a callable instead of an
instance so that it's not shared between all field instances.
fields.E011: <database> does not support default database values with
expressions (db_default).
fields.E012: <expression> cannot be used in db_default.
fields.E100: AutoFields must set primary_key=True.
fields.E110: BooleanFields do not accept null values. This check
appeared before support for null values was added in Django 2.1.
fields.E120: CharFields must define a max_length attribute.
fields.E121: max_length must be a positive integer.
fields.W122: max_length is ignored when used with
<integer field type>.
fields.E130: DecimalFields must define a decimal_places attribute.
fields.E131: decimal_places must be a non-negative integer.
fields.E132: DecimalFields must define a max_digits attribute.
fields.E133: max_digits must be a positive integer.
fields.E134: max_digits must be greater or equal to decimal_places.
fields.E140: FilePathFields must have either allow_files or
allow_folders set to True.
fields.E150: GenericIPAddressFields cannot have blank=True if
null=False, as blank values are stored as nulls.
fields.E160: The options auto_now, auto_now_add, and default
are mutually exclusive. Only one of these options may be present.
fields.W161: Fixed default value provided.
fields.W162: <database> does not support a database index on
<field data type> columns.
fields.W163: <database> does not support comments on columns
(db_comment).
fields.E170: BinaryField’s default cannot be a string. Use bytes
content instead.
fields.E180: <database> does not support JSONFields.
fields.E190: <database> does not support a database collation on
<field_type>s.
fields.E220: <database> does not support GeneratedFields.
fields.E221: <database> does not support non-persisted
GeneratedFields.
fields.E222: <database> does not support persisted
GeneratedFields.
fields.E223: GeneratedField.output_field has errors: ...
fields.W224: GeneratedField.output_field has warnings: ...
fields.E900: IPAddressField has been removed except for support in
historical migrations.
fields.W900: IPAddressField has been deprecated. Support for it
(except in historical migrations) will be removed in Django 1.9. This check
appeared in Django 1.7 and 1.8.
fields.W901: CommaSeparatedIntegerField has been deprecated. Support
for it (except in historical migrations) will be removed in Django 2.0. This
check appeared in Django 1.10 and 1.11.
fields.E901: CommaSeparatedIntegerField is removed except for support
in historical migrations.
fields.W902: FloatRangeField is deprecated and will be removed in
Django 3.1. This check appeared in Django 2.2 and 3.0.
fields.W903: NullBooleanField is deprecated. Support for it (except
in historical migrations) will be removed in Django 4.0. This check appeared
in Django 3.1 and 3.2.
fields.E903: NullBooleanField is removed except for support in
historical migrations.
fields.W904: django.contrib.postgres.fields.JSONField is deprecated.
Support for it (except in historical migrations) will be removed in Django
4.0. This check appeared in Django 3.1 and 3.2.
fields.E904: django.contrib.postgres.fields.JSONField is removed
except for support in historical migrations.
fields.W905: django.contrib.postgres.fields.CICharField is
deprecated. Support for it (except in historical migrations) will be removed
in Django 5.1. This check appeared in Django 4.2 and 5.0.
fields.E905: django.contrib.postgres.fields.CICharField is removed
except for support in historical migrations.
fields.W906: django.contrib.postgres.fields.CIEmailField is
deprecated. Support for it (except in historical migrations) will be removed
in Django 5.1. This check appeared in Django 4.2 and 5.0.
fields.E906: django.contrib.postgres.fields.CIEmailField is removed
except for support in historical migrations.
fields.W907: django.contrib.postgres.fields.CITextField is
deprecated. Support for it (except in historical migrations) will be removed
in Django 5.1. This check appeared in Django 4.2 and 5.0.
fields.E907: django.contrib.postgres.fields.CITextField is removed
except for support for historical migrations.
fields.E200: unique is not a valid argument for a FileField.
This check is removed in Django 1.11.
fields.E201: primary_key is not a valid argument for a FileField.
fields.E202: FileField’s upload_to argument must be a relative
path, not an absolute path.
fields.E210: Cannot use ImageField because Pillow is not installed.
models.E001: <swappable> is not of the form app_label.app_name.
models.E002: <SETTING> references <model>, which has not been
installed, or is abstract.
models.E003: The model has two identical many-to-many relations through
the intermediate model <app_label>.<model>.
models.E004: id can only be used as a field name if the field also
sets primary_key=True.
models.E005: The field <field name> from parent model <model>
clashes with the field <field name> from parent model <model>.
models.E006: The field <field name> clashes with the field
<field name> from model <model>.
models.E007: Field <field name> has column name <column name>
that is used by another field.
models.E008: index_together must be a list or tuple. This check
appeared before Django 5.1.
models.E009: All index_together elements must be lists or tuples.
This check appeared before Django 5.1.
models.E010: unique_together must be a list or tuple.
models.E011: All unique_together elements must be lists or tuples.
models.E012: constraints/indexes/unique_together refers to the
nonexistent field <field name>.
models.E013: constraints/indexes/unique_together refers to a
ManyToManyField <field name>, but ManyToManyFields are not
supported for that option.
models.E014: ordering must be a tuple or list (even if you want to
order by only one field).
models.E015: ordering refers to the nonexistent field, related field,
or lookup <field name>.
models.E016: constraints/indexes/unique_together refers to field
<field_name> which is not local to model <model>.
models.E017: Proxy model <model> contains model fields.
models.E018: Autogenerated column name too long for field <field>.
Maximum length is <maximum length> for database <alias>.
models.E019: Autogenerated column name too long for M2M field
<M2M field>. Maximum length is <maximum length> for database
<alias>.
models.E020: The <model>.check() class method is currently overridden.
models.E021: ordering and order_with_respect_to cannot be used
together.
models.E022: <function> contains a lazy reference to
<app label>.<model>, but app <app label> isn't installed or
doesn't provide model <model>.
models.E023: The model name <model> cannot start or end with an
underscore as it collides with the query lookup syntax.
models.E024: The model name <model> cannot contain double underscores
as it collides with the query lookup syntax.
models.E025: The property <property name> clashes with a related
field accessor.
models.E026: The model cannot have more than one field with
primary_key=True.
models.W027: <database> does not support check constraints.
models.E028: db_table <db_table> is used by multiple models:
<model list>.
models.E029: index name <index> is not unique for model <model>.
models.E030: index name <index> is not unique among models:
<model list>.
models.E031: constraint name <constraint> is not unique for model
<model>.
models.E032: constraint name <constraint> is not unique among
models: <model list>.
models.E033: The index name <index> cannot start with an underscore
or a number.
models.E034: The index name <index> cannot be longer than
<max_length> characters.
models.W035: db_table <db_table> is used by multiple models:
<model list>.
models.W036: <database> does not support unique constraints with
conditions.
models.W037: <database> does not support indexes with conditions.
models.W038: <database> does not support deferrable unique
constraints.
models.W039: <database> does not support unique constraints with
non-key columns.
models.W040: <database> does not support indexes with non-key
columns.
models.E041: constraints refers to the joined field <field name>.
models.W042: Auto-created primary key used when not defining a primary
key type, by default django.db.models.AutoField.
models.W043: <database> does not support indexes on expressions.
models.W044: <database> does not support unique constraints on
expressions.
models.W045: Check constraint <constraint> contains RawSQL()
expression and won't be validated during the model full_clean().
models.W046: <database> does not support comments on tables
(db_table_comment).
models.W047: <database> does not support unique constraints with
nulls distinct.
The security checks do not make your site secure. They do not audit code, do intrusion detection, or do anything particularly complex. Rather, they help perform an automated, low-hanging-fruit checklist, that can help you to improve your site's security.
Some of these checks may not be appropriate for your particular deployment
configuration. For instance, if you do your HTTP to HTTPS redirection in a load
balancer, it'd be irritating to be constantly warned about not having enabled
SECURE_SSL_REDIRECT. Use SILENCED_SYSTEM_CHECKS to
silence unneeded checks.
The following checks are run if you use the check --deploy option:
security.W001: You do not have
django.middleware.security.SecurityMiddleware in your
MIDDLEWARE so the SECURE_HSTS_SECONDS,
SECURE_CONTENT_TYPE_NOSNIFF, SECURE_REFERRER_POLICY,
SECURE_CROSS_ORIGIN_OPENER_POLICY, and
SECURE_SSL_REDIRECT settings will have no effect.
security.W002: You do not have
django.middleware.clickjacking.XFrameOptionsMiddleware in your
MIDDLEWARE, so your pages will not be served with an
'x-frame-options' header. Unless there is a good reason for your
site to be served in a frame, you should consider enabling this
header to help prevent clickjacking attacks.
security.W003: You don't appear to be using Django's built-in cross-site
request forgery protection via the middleware
(django.middleware.csrf.CsrfViewMiddleware is not in your
MIDDLEWARE). Enabling the middleware is the safest
approach to ensure you don't leave any holes.
security.W004: You have not set a value for the
SECURE_HSTS_SECONDS setting. If your entire site is served only
over SSL, you may want to consider setting a value and enabling HTTP
Strict Transport Security. Be sure to read
the documentation first; enabling HSTS carelessly can cause serious,
irreversible problems.
security.W005: You have not set the
SECURE_HSTS_INCLUDE_SUBDOMAINS setting to True. Without this,
your site is potentially vulnerable to attack via an insecure connection to a
subdomain. Only set this to True if you are certain that all subdomains of
your domain should be served exclusively via SSL.
security.W006: Your SECURE_CONTENT_TYPE_NOSNIFF setting is not
set to True, so your pages will not be served with an
'X-Content-Type-Options: nosniff' header. You should consider enabling
this header to prevent the browser from identifying content types incorrectly.
security.W007: Your SECURE_BROWSER_XSS_FILTER setting is not
set to True, so your pages will not be served with an
'X-XSS-Protection: 1; mode=block' header. You should consider enabling
this header to activate the browser's XSS filtering and help prevent XSS
attacks. This check is removed in Django 3.0 as the X-XSS-Protection
header is no longer honored by modern browsers.
security.W008: Your SECURE_SSL_REDIRECT setting is not set to
True. Unless your site should be available over both SSL and non-SSL
connections, you may want to either set this setting to True or configure
a load balancer or reverse-proxy server to redirect all connections to HTTPS.
security.W009: Your SECRET_KEY has less than 50 characters,
less than 5 unique characters, or it's prefixed with 'django-insecure-'
indicating that it was generated automatically by Django. Please generate a
long and random value, otherwise many of Django's security-critical features
will be vulnerable to attack.
security.W010: You have django.contrib.sessions in your
INSTALLED_APPS but you have not set
SESSION_COOKIE_SECURE to True. Using a secure-only session
cookie makes it more difficult for network traffic sniffers to hijack user
sessions.
security.W011: You have
django.contrib.sessions.middleware.SessionMiddleware in your
MIDDLEWARE, but you have not set SESSION_COOKIE_SECURE
to True. Using a secure-only session cookie makes it more difficult for
network traffic sniffers to hijack user sessions.
security.W012: SESSION_COOKIE_SECURE is not set to True.
Using a secure-only session cookie makes it more difficult for network traffic
sniffers to hijack user sessions.
security.W013: You have django.contrib.sessions in your
INSTALLED_APPS, but you have not set
SESSION_COOKIE_HTTPONLY to True. Using an HttpOnly session
cookie makes it more difficult for cross-site scripting attacks to hijack user
sessions.
security.W014: You have
django.contrib.sessions.middleware.SessionMiddleware in your
MIDDLEWARE, but you have not set SESSION_COOKIE_HTTPONLY
to True. Using an HttpOnly session cookie makes it more difficult for
cross-site scripting attacks to hijack user sessions.
security.W015: SESSION_COOKIE_HTTPONLY is not set to True.
Using an HttpOnly session cookie makes it more difficult for cross-site
scripting attacks to hijack user sessions.
security.W016: CSRF_COOKIE_SECURE is not set to True.
Using a secure-only CSRF cookie makes it more difficult for network traffic
sniffers to steal the CSRF token.
security.W017: CSRF_COOKIE_HTTPONLY is not set to True.
Using an HttpOnly CSRF cookie makes it more difficult for cross-site
scripting attacks to steal the CSRF token. This check is removed in Django
1.11 as the CSRF_COOKIE_HTTPONLY setting offers no practical
benefit.
security.W018: You should not have DEBUG set to True in
deployment.
security.W019: You have
django.middleware.clickjacking.XFrameOptionsMiddleware in your
MIDDLEWARE, but X_FRAME_OPTIONS is not set to
'DENY'. Unless there is a good reason for your site to serve other parts
of itself in a frame, you should change it to 'DENY'.
security.W020: ALLOWED_HOSTS must not be empty in deployment.
security.W021: You have not set the
SECURE_HSTS_PRELOAD setting to True. Without this, your site
cannot be submitted to the browser preload list.
security.W022: You have not set the SECURE_REFERRER_POLICY
setting. Without this, your site will not send a Referrer-Policy header. You
should consider enabling this header to protect user privacy.
security.E023: You have set the SECURE_REFERRER_POLICY setting
to an invalid value.
security.E024: You have set the
SECURE_CROSS_ORIGIN_OPENER_POLICY setting to an invalid value.
security.W025: Your
SECRET_KEY_FALLBACKS[n] has less than 50
characters, less than 5 unique characters, or it's prefixed with
'django-insecure-' indicating that it was generated automatically by
Django. Please generate a long and random value, otherwise many of Django's
security-critical features will be vulnerable to attack.
The following checks verify that your security-related settings are correctly configured:
security.E100: DEFAULT_HASHING_ALGORITHM must be 'sha1' or
'sha256'. This check appeared in Django 3.1 and 3.2.
security.E101: The CSRF failure view 'path.to.view' does not take the
correct number of arguments.
security.E102: The CSRF failure view 'path.to.view' could not be
imported.
signals.E001: <handler> was connected to the <signal> signal with
a lazy reference to the sender <app label>.<model>, but app <app label>
isn't installed or doesn't provide model <model>.
The following checks verify that your TEMPLATES setting is correctly
configured:
templates.E001: You have 'APP_DIRS': True in your
TEMPLATES but also specify 'loaders' in OPTIONS. Either
remove APP_DIRS or remove the 'loaders' option.
templates.E002: string_if_invalid in TEMPLATES
OPTIONS must be a string but got: {value}
({type}).
templates.E003:<name> is used for multiple template tag modules:
<module list>. This check was changed to templates.W003 in Django
4.1.2.
templates.W003:<name> is used for multiple template tag modules:
<module list>.
The following checks are performed on your translation configuration:
translation.E001: You have provided an invalid value for the
LANGUAGE_CODE setting: <value>.
translation.E002: You have provided an invalid language code in the
LANGUAGES setting: <value>.
translation.E003: You have provided an invalid language code in the
LANGUAGES_BIDI setting: <value>.
translation.E004: You have provided a value for the
LANGUAGE_CODE setting that is not in the LANGUAGES
setting.
The following checks are performed on your URL configuration:
urls.W001: Your URL pattern <pattern> uses
include() with a route ending with a $. Remove the
dollar from the route to avoid problems including URLs.
urls.W002: Your URL pattern <pattern> has a route beginning with
a /. Remove this slash as it is unnecessary. If this pattern is targeted
in an include(), ensure the include()
pattern has a trailing /.
urls.W003: Your URL pattern <pattern> has a name
including a :. Remove the colon, to avoid ambiguous namespace
references.
urls.E004: Your URL pattern <pattern> is invalid. Ensure that
urlpatterns is a list of path() and/or
re_path() instances.
urls.W005: URL namespace <namespace> isn't unique. You may not be
able to reverse all URLs in this namespace.
urls.E006: The MEDIA_URL/ STATIC_URL setting must
end with a slash.
urls.E007: The custom handlerXXX view 'path.to.view' does not
take the correct number of arguments (…).
urls.E008: The custom handlerXXX view 'path.to.view' could not be
imported.
urls.E009: Your URL pattern <pattern> has an invalid view, pass
<view>.as_view() instead of <view>.
urls.W010: Your URL pattern <pattern> has an unmatched
<angle bracket>.
contrib app checks¶admin¶Admin checks are all performed as part of the admin tag.
The following checks are performed on any
ModelAdmin (or subclass) that is registered
with the admin site:
admin.E001: The value of raw_id_fields must be a list or tuple.
admin.E002: The value of raw_id_fields[n] refers to <field name>,
which is not a field of <model>.
admin.E003: The value of raw_id_fields[n] must be a foreign key or
a many-to-many field.
admin.E004: The value of fields must be a list or tuple.
admin.E005: Both fieldsets and fields are specified.
admin.E006: The value of fields contains duplicate field(s).
admin.E007: The value of fieldsets must be a list or tuple.
admin.E008: The value of fieldsets[n] must be a list or tuple.
admin.E009: The value of fieldsets[n] must be of length 2.
admin.E010: The value of fieldsets[n][1] must be a dictionary.
admin.E011: The value of fieldsets[n][1] must contain the key
fields.
admin.E012: There are duplicate field(s) in fieldsets[n][1].
admin.E013: The value of
fields[n]/filter_horizontal[n]/filter_vertical[n]/fieldsets[n][m] cannot
include the ManyToManyField <field name>, because that field manually
specifies a relationship model.
admin.E014: The value of exclude must be a list or tuple.
admin.E015: The value of exclude contains duplicate field(s).
admin.E016: The value of form must inherit from BaseModelForm.
admin.E017: The value of filter_vertical must be a list or tuple.
admin.E018: The value of filter_horizontal must be a list or tuple.
admin.E019: The value of filter_vertical[n]/filter_horizontal[n]
refers to <field name>, which is not a field of <model>.
admin.E020: The value of filter_vertical[n]/filter_horizontal[n]
must be a many-to-many field.
admin.E021: The value of radio_fields must be a dictionary.
admin.E022: The value of radio_fields refers to <field name>,
which is not a field of <model>.
admin.E023: The value of radio_fields refers to <field name>,
which is not an instance of ForeignKey, and does not have a choices
definition.
admin.E024: The value of radio_fields[<field name>] must be either
admin.HORIZONTAL or admin.VERTICAL.
admin.E025: The value of view_on_site must be either a callable or a
boolean value.
admin.E026: The value of prepopulated_fields must be a dictionary.
admin.E027: The value of prepopulated_fields refers to
<field name>, which is not a field of <model>.
admin.E028: The value of prepopulated_fields refers to
<field name>, which must not be a DateTimeField, a ForeignKey,
a OneToOneField, or a ManyToManyField field.
admin.E029: The value of prepopulated_fields[<field name>] must be a
list or tuple.
admin.E030: The value of prepopulated_fields refers to
<field name>, which is not a field of <model>.
admin.E031: The value of ordering must be a list or tuple.
admin.E032: The value of ordering has the random ordering marker
?, but contains other fields as well.
admin.E033: The value of ordering refers to <field name>, which
is not a field of <model>.
admin.E034: The value of readonly_fields must be a list or tuple.
admin.E035: The value of readonly_fields[n] refers to
<field_name>, which is not a callable, an attribute of
<ModelAdmin class>, or an attribute of <model>.
admin.E036: The value of autocomplete_fields must be a list or tuple.
admin.E037: The value of autocomplete_fields[n] refers to
<field name>, which is not a field of <model>.
admin.E038: The value of autocomplete_fields[n] must be a foreign
key or a many-to-many field.
admin.E039: An admin for model <model> has to be registered to be
referenced by <modeladmin>.autocomplete_fields.
admin.E040: <modeladmin> must define search_fields, because
it's referenced by <other_modeladmin>.autocomplete_fields.
ModelAdmin¶The following checks are performed on any
ModelAdmin that is registered
with the admin site:
admin.E101: The value of save_as must be a boolean.
admin.E102: The value of save_on_top must be a boolean.
admin.E103: The value of inlines must be a list or tuple.
admin.E104: <InlineModelAdmin class> must inherit from
InlineModelAdmin.
admin.E105: <InlineModelAdmin class> must have a model attribute.
admin.E106: The value of <InlineModelAdmin class>.model must be a
Model.
admin.E107: The value of list_display must be a list or tuple.
admin.E108: The value of list_display[n] refers to <label>,
which is not a callable, an attribute of <ModelAdmin class>, or an
attribute or method on <model>.
admin.E109: The value of list_display[n] must not be a many-to-many
field or a reverse foreign key.
admin.E110: The value of list_display_links must be a list, a tuple,
or None.
admin.E111: The value of list_display_links[n] refers to <label>,
which is not defined in list_display.
admin.E112: The value of list_filter must be a list or tuple.
admin.E113: The value of list_filter[n] must inherit from
ListFilter.
admin.E114: The value of list_filter[n] must not inherit from
FieldListFilter.
admin.E115: The value of list_filter[n][1] must inherit from
FieldListFilter.
admin.E116: The value of list_filter[n] refers to <label>,
which does not refer to a Field.
admin.E117: The value of list_select_related must be a boolean,
tuple or list.
admin.E118: The value of list_per_page must be an integer.
admin.E119: The value of list_max_show_all must be an integer.
admin.E120: The value of list_editable must be a list or tuple.
admin.E121: The value of list_editable[n] refers to <label>,
which is not a field of <model>.
admin.E122: The value of list_editable[n] refers to <label>,
which is not contained in list_display.
admin.E123: The value of list_editable[n] cannot be in both
list_editable and list_display_links.
admin.E124: The value of list_editable[n] refers to the first field
in list_display (<label>), which cannot be used unless
list_display_links is set.
admin.E125: The value of list_editable[n] refers to <field name>,
which is not editable through the admin.
admin.E126: The value of search_fields must be a list or tuple.
admin.E127: The value of date_hierarchy refers to <field name>,
which does not refer to a Field.
admin.E128: The value of date_hierarchy must be a DateField or
DateTimeField.
admin.E129: <modeladmin> must define a has_<foo>_permission()
method for the <action> action.
admin.E130: __name__ attributes of actions defined in
<modeladmin> must be unique. Name <name> is not unique.
InlineModelAdmin¶The following checks are performed on any
InlineModelAdmin that is registered as an
inline on a ModelAdmin.
admin.E201: Cannot exclude the field <field name>, because it is the
foreign key to the parent model <app_label>.<model>.
admin.E202: <model> has no ForeignKey to <parent model>./
<model> has more than one ForeignKey to <parent model>. You must
specify a fk_name attribute.
admin.E203: The value of extra must be an integer.
admin.E204: The value of max_num must be an integer.
admin.E205: The value of min_num must be an integer.
admin.E206: The value of formset must inherit from
BaseModelFormSet.
GenericInlineModelAdmin¶The following checks are performed on any
GenericInlineModelAdmin that is
registered as an inline on a ModelAdmin.
admin.E301: 'ct_field' references <label>, which is not a field
on <model>.
admin.E302: 'ct_fk_field' references <label>, which is not a
field on <model>.
admin.E303: <model> has no GenericForeignKey.
admin.E304: <model> has no GenericForeignKey using content type
field <field name> and object ID field <field name>.
AdminSite¶The following checks are performed on the default
AdminSite:
admin.E401: django.contrib.contenttypes must be in
INSTALLED_APPS in order to use the admin application.
admin.E402: django.contrib.auth.context_processors.auth
must be enabled in DjangoTemplates
(TEMPLATES) if using the default auth backend in order to use the
admin application.
admin.E403: A django.template.backends.django.DjangoTemplates
instance must be configured in TEMPLATES in order to use the
admin application.
admin.E404: django.contrib.messages.context_processors.messages
must be enabled in DjangoTemplates
(TEMPLATES) in order to use the admin application.
admin.E405: django.contrib.auth must be in
INSTALLED_APPS in order to use the admin application.
admin.E406: django.contrib.messages must be in
INSTALLED_APPS in order to use the admin application.
admin.E408:
django.contrib.auth.middleware.AuthenticationMiddleware must be in
MIDDLEWARE in order to use the admin application.
admin.E409: django.contrib.messages.middleware.MessageMiddleware
must be in MIDDLEWARE in order to use the admin application.
admin.E410: django.contrib.sessions.middleware.SessionMiddleware
must be in MIDDLEWARE in order to use the admin application.
admin.W411: django.template.context_processors.request must be
enabled in DjangoTemplates
(TEMPLATES) in order to use the admin navigation sidebar.
auth¶auth.E001: REQUIRED_FIELDS must be a list or tuple.
auth.E002: The field named as the USERNAME_FIELD for a custom user
model must not be included in REQUIRED_FIELDS.
auth.E003: <field> must be unique because it is named as the
USERNAME_FIELD.
auth.W004: <field> is named as the USERNAME_FIELD, but it is not
unique.
auth.E005: The permission codenamed <codename> clashes with a builtin
permission for model <model>.
auth.E006: The permission codenamed <codename> is duplicated for model
<model>.
auth.E007: The verbose_name of model <model> must be at most
244 characters for its builtin permission names
to be at most 255 characters.
auth.E008: The permission named <name> of model <model> is longer
than 255 characters.
auth.C009: <User model>.is_anonymous must be an attribute or property
rather than a method. Ignoring this is a security issue as anonymous users
will be treated as authenticated!
auth.C010: <User model>.is_authenticated must be an attribute or
property rather than a method. Ignoring this is a security issue as anonymous
users will be treated as authenticated!
auth.E011: The name of model <model> must be at most 93 characters
for its builtin permission names to be at most 100 characters.
auth.E012: The permission codenamed <codename> of model <model>
is longer than 100 characters.
contenttypes¶The following checks are performed when a model contains a
GenericForeignKey or
GenericRelation:
contenttypes.E001: The GenericForeignKey object ID references the
nonexistent field <field>.
contenttypes.E002: The GenericForeignKey content type references the
nonexistent field <field>.
contenttypes.E003: <field> is not a ForeignKey.
contenttypes.E004: <field> is not a ForeignKey to
contenttypes.ContentType.
contenttypes.E005: Model names must be at most 100 characters.
postgres¶The following checks are performed on django.contrib.postgres model
fields:
postgres.E001: Base field for array has errors: ...
postgres.E002: Base field for array cannot be a related field.
postgres.E003: <field> default should be a callable instead of an
instance so that it's not shared between all field instances. This check was
changed to fields.E010 in Django 3.1.
postgres.W004: Base field for array has warnings: ...
sites¶The following checks are performed on any model using a
CurrentSiteManager:
sites.E001: CurrentSiteManager could not find a field named
<field name>.
sites.E002: CurrentSiteManager cannot use <field> as it is not a
foreign key or a many-to-many field.
The following checks verify that django.contrib.sites is correctly
configured:
sites.E101: The SITE_ID setting must be an integer.
staticfiles¶The following checks verify that django.contrib.staticfiles is correctly
configured:
staticfiles.E001: The STATICFILES_DIRS setting is not a tuple
or list.
staticfiles.E002: The STATICFILES_DIRS setting should not
contain the STATIC_ROOT setting.
staticfiles.E003: The prefix <prefix> in the
STATICFILES_DIRS setting must not end with a slash.
staticfiles.W004: The directory <directory> in the
STATICFILES_DIRS does not exist.
staticfiles.E005: The STORAGES setting must define a
staticfiles storage.
Jan 15, 2024