day = 0
db.mydatabase.mycollection.find({ 
    "$expr": { 
        "$eq": [ { "$dayOfWeek": "$date" }, day ] 
    } 
})

./tests/runtests.py from_db_value.tests.FromDBValueTest.test_aggregation
Testing against Django installed in '/home/tim/code/django/django' with up to 3 processes
Found 1 test(s).
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
E
======================================================================
ERROR: test_aggregation (from_db_value.tests.FromDBValueTest.test_aggregation)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/tim/code/django/tests/from_db_value/tests.py", line 26, in test_aggregation
    maximum = CashModel.objects.aggregate(m=Max("cash"))["m"]
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tim/code/django/django/db/models/manager.py", line 87, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tim/code/django/django/db/models/query.py", line 604, in aggregate
    return self.query.chain().get_aggregation(self.db, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tim/code/django/django/db/models/sql/query.py", line 620, in get_aggregation
    result = next(compiler.apply_converters((result,), converters))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tim/code/django/django/db/models/sql/compiler.py", line 1500, in apply_converters
    value = converter(value, expression, connection)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/tim/code/django-mongodb/django_mongodb/operations.py", line 38, in convert_decimalfield_value
    value = decimal.Decimal(value)
            ^^^^^^^^^^^^^^^^^^^^^^
TypeError: conversion from dict to Decimal is not supported

<pre class="exception_value" style="padding: 0px; margin: 10px 0px; font-size: 1.5em; white-space: pre-wrap; word-break: break-word; font-family: sans-serif; color: rgb(87, 87, 87); font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">QuerySet.select_related() is not supported on MongoDB.</pre>
Request Method: | GET
-- | --
http://127.0.0.1:8000/admin/
5.0.6
NotSupportedError
QuerySet.select_related() is not supported on MongoDB.
/opt/homebrew/Caskroom/miniforge/base/envs/django/lib/python3.12/site-packages/django_mongodb/compiler.py, line 113, in check_query
django.contrib.admin.sites.index
/opt/homebrew/Caskroom/miniforge/base/envs/django/bin/python
3.12.3
['/Users/jib/mongo/starterapp/storefront',  '/opt/homebrew/Caskroom/miniforge/base/envs/django/lib/python312.zip',  '/opt/homebrew/Caskroom/miniforge/base/envs/django/lib/python3.12',  '/opt/homebrew/Caskroom/miniforge/base/envs/django/lib/python3.12/lib-dynload',  '/opt/homebrew/Caskroom/miniforge/base/envs/django/lib/python3.12/site-packages']

Environment:


Request Method: GET
Request URL: http://127.0.0.1:8000/admin/

Django Version: 5.0.6
Python Version: 3.12.3
Installed Applications:
['apps.MongoAdminConfig',
 'apps.MongoAuthConfig',
 'apps.MongoContentTypesConfig',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'playground']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware']

$ mongod --version
db version v7.0.8
Build Info: {
    "version": "7.0.8",
    "gitVersion": "c5d33e55ba38d98e2f48765ec4e55338d67a4a64",
    "openSSLVersion": "OpenSSL 1.1.1f  31 Mar 2020",
    "modules": [],
    "allocator": "tcmalloc",
    "environment": {
        "distmod": "ubuntu2004",
        "distarch": "x86_64",
        "target_arch": "x86_64"
    }
}