Mongoid::Errors::DocumentNotFound raise_not_found_error - ruby-on-rails

Question

* updated at the bottom *
When looking for user that doesnt exist, I am getting:
Mongoid::Errors::DocumentNotFound in UsersController#show
Problem:
Document(s) not found for class User with id(s) 22. Summary: When
calling User.find with an id or array of ids, each parameter must
match a document in the database or this error will be raised. The
search was for the id(s): 22 ... (1 total) and the following ids were
not found: 22. Resolution: Search for an id that is in the database or
set the Mongoid.raise_not_found_error configuration option to false,
which will cause a nil to be returned instead of raising this error
when searching for a single id, or only the matched documents when
searching for multiples.
However I am setting raise_not_found_error to false
mongoid.yml
development:
adapter: 'mongoid'
# Configure available database sessions. (required)
sessions:
# Defines the default session. (required)
default:
# Defines the name of the default database that Mongoid can connect to.
# (required).
database: blog_development
# Provides the hosts the default session can connect to. Must be an array
# of host:port pairs. (required)
hosts:
- localhost:27017
options:
allow_dynamic_fields: false
identity_map_enabled: true
include_root_in_json: true
include_type_for_serialization: true
# Note this can also be true if you want to preload everything, but this is
# almost never necessary. Most of the time set this to false.
preload_models:
- Canvas
- Browser
- Firefox
scope_overwrite_exception: true
raise_not_found_error: false
skip_version_check: false
use_activesupport_time_zone: false
use_utc: true
# Configure Mongoid specific options. (optional)
options:
# Enable the identity map, needed for eager loading. (default: false)
# identity_map_enabled: false
# Includes the root model name in json serialization. (default: false)
# include_root_in_json: false
# Include the _type field in serializaion. (default: false)
# include_type_for_serialization: false
# Preload all models in development, needed when models use
# inheritance. (default: false)
# preload_models: false
# Protect id and type from mass assignment. (default: true)
# protect_sensitive_fields: true
# Raise an error when performing a #find and the document is not found.
# (default: true)
raise_not_found_error: false
# Raise an error when defining a scope with the same name as an
# existing method. (default: false)
scope_overwrite_exception: false
# Skip the database version check, used when connecting to a db without
# admin access. (default: false)
# skip_version_check: false
# Use Active Support's time zone in conversions. (default: true)
# use_activesupport_time_zone: true
# Ensure all times are UTC in the app side. (default: false)
# use_utc: false
test:
sessions:
default:
database: blog_test
hosts:
- localhost:27017
options:
consistency: :strong
# In the test environment we lower the retries and retry interval to
# low amounts for fast failures.
max_retries: 1
retry_interval: 0
Controller
# GET /users/1
# GET /users/1.json
def show
#user = User.find(params[:id])
render json: #user
end
* UPDATE **
fixed a null response (not in a json format) going out by doing this:
def show
#user = User.find(params[:id])
if #user.nil?
#user = []
end
render json: #user
end

Answer 1

your structure of yml is wrong
has to be -
development:
sessions:
options:
#raise_not_found_error has to be not here but see below
options: #strictly 2 spaces before
raise_not_found_error: false #strictly 4 spaces before not 6
so, raise_not_found_error parameter has to be child of development>options, not development>sessions>options

Answer 2

For me even correct indenting didn't work, what did is to create an initializer file called mongoid.rb in config/initializers/ and put this into it
Mongoid.raise_not_found_error = false

Answer 3

To save someone few minutes, if you are still having a problem and you are sure your mongoid.yml configs are correct, try to stop spring server as it seems to do a lot of caching!
$ spring stop