ActionController::Parameters converts integer to string - ruby-on-rails

I have defined user_params in rails 5, like this:
def training_plan_params
params.require(:training_plan).permit(
:training_plan_id,
:sport_id,
:distance,
lastTrainingStatus: [:duration,:reps,:type,:level],
trainings: [:text, :order, :level],
modified: [:level,:duration]
)
end
but when i send the params to rails, like this:
{ training_plan: { sport_id: 2, distance: 900 } }
it doesn't retrieve the distance in the controller as integer, like this:
=> <ActionController::Parameters {"sport_id"=>"2", "distance"=>"900"} permitted: true>
=> training_plan_params[:distance]
=> "900"
is there a way to keep its type and not converts it to string?

Was dealing with the same issue today, and I did some searching around.
I found this post: Rails test is converting my array of ints to an array of strings
Basically, the issue is with the way you're (we're) using ActionDispatch::IntegrationTest, not with ActionController::Parameters.
I solved this by converting the input to my PUT/POST call with .to_json and providing headers: { 'Content-Type': 'application/json' } to the PUT/POST call. That then led to the test router treating my data as json and preserving the typings, rather than defaulting to treating things as text.

Related

Ruby change hash to single layer with square brackets

I've got a hash and I've found that with net/http posting I have to convert it into a flat format.
Example
invoice = { :no => "100", :date => "08/08/2022", :client => {:name => "Foo" } }
Would become
params = { "invoice[no]" => "100", "invoice[date]" => "08/08/2022", "invoice[client][name]" => "Foo" }
Is there a way to do this automatically? I've tried to_param & to_query, flatten and encode_www_form but they don't convert it to this required format.
The post action I'm doing is to a Ruby On Rails backend which I use Devise Tokens to authorise.
res = Net::HTTP.post_form(uri, params)
You need CGI.parse method. It parses an HTTP query string into a hash of key => value pairs
CGI.parse({ invoice: invoice }.to_query)
# => {"invoice[client][name]"=>["Foo"], "invoice[date]"=>["08/08/2022"], "invoice[no]"=>["100"]
Don't care about single-element arrays as values. It will works well
params = CGI.parse({ invoice: invoice }.to_query)
res = Net::HTTP.post_form(uri, params)
I think this snippet should do the job:
invoice = { :no => "100", :date => "08/08/2022", :client => {:name => "Foo" } }
CGI.unescape({invoice:}.to_query)
.split('&')
.map{ |p| p.split('=') }
.to_h
{"invoice[client][name]"=>"Foo", "invoice[date]"=>"08/08/2022", "invoice[no]"=>"100"}
First of all, we let ActiveRecord generate the query-like structure from a hash using the method to_query. We need to unescape the query string afterward since we don't want to have URL-encoded output there. After that we split the string by parameter using split('&') and every parameter into key-value using split('='). Finally, we convert the output back into a hash.

Rails API: Cannot whitelist JSON field attribute

I'm building a rails API with a model containing an attribute data of JSON type. (PSQL)
But when I try to post something like this
{ model: { name: 'Hello', data: { a: 1, b: 2 } } }
Rails thinks a and b are the attributes of a nested data association... It considers then they are unpermitted params.
The thing is, { a: 1, b: 2 } is the value of my field data.
How to provide JSON value to an attribute ?
-
Edit:
The error displayed is:
Unpermitted parameters: name, provider, confidence, location_type, formatted_address, place_id, types, locality, ...
The value of the data attribute is { name: 'Name', provider: 'Provider', ... }
Like I said Rails thinks they are the attributes of a nested data association.
-
Log:
Pastebin
if the keys are unknown in advance this could be a workaround:
def model_params
data_keys = params[:model].try(:fetch, :data, {}).keys
params.require(:model).permit(data: data_keys)
end
Credit goes to aliibrahim, read the discussion https://github.com/rails/rails/issues/9454 (P.S seems like strong parameters will support this use case in Rails 5.1)
When you post something, you have to make sure that your json have the same parameters that your controller.
Example rails api:
def example
#model = Model.new(params)
#model.save
render(json: model.to_json, status: :ok)
end
def params
params.permit(:name, :provider, {:data => [:a, :b]})
end
Example front-end json for post:
var body = {
name: 'myName',
provider: 'provider',
data: {
a: 'something',
b: 'otherthing',
}
};
For some reason rails doesnt recognize a nested json, so you need to write into params.permit that data will be a json with that syntax, if where a array, the [] should be empty.

Rails - permit a param of unknown type (string, hash, array, or fixnum)

My model has a custom_fields column that serializes an array of hashes. Each of these hashes has a value attribute, which can be a hash, array, string, or fixnum. What could I do to permit this value attribute regardless of its type?
My current permitted params line looks something like:
params.require(:model_name).permit([
:field_one,
:field_two,
custom_fields: [:value]
])
Is there any way I can modify this to accept when value is an unknown type?
What you want can probably be done, but will take some work. Your best bet is this post: http://blog.trackets.com/2013/08/17/strong-parameters-by-example.html
This is not my work, but I have used the technique they outline in an app I wrote. The part you are looking for is at the end:
params = ActionController::Parameters.new(user: { username: "john", data: { foo: "bar" } })
# let's assume we can't do this because the data hash can contain any kind of data
params.require(:user).permit(:username, data: [ :foo ])
# we need to use the power of ruby to do this "by hand"
params.require(:user).permit(:username).tap do |whitelisted|
whitelisted[:data] = params[:user][:data]
end
# Unpermitted parameters: data
# => { "username" => "john", "data" => {"foo"=>"bar"} }
That blog post helped me understand params and I still refer to it when I need to brush up on the details.

Rails, correct JSON body for a serialized field?

If I have a Rails model with a serialized field,
class Tournament < ActiveRecord::Base
serialize :prizes, Array
end
and I have the model available through a REST API, what is the correct format of the POST body?
I've tried the following in a Rspec test,
post :create, {
format: :json,
tournament: {
prizes: [
'z2000',
'z1000',
'z500',
'z250'
]
}
}
but this results in object with prizes set to blank.
Figure it out. The fix is completely unrelated to my JSON request body.
I had assigned my strong params in my controller as,
params.permit(:prizes)
But due to it being an array, I need the following
params.permit(prizes: [])
From https://github.com/rails/strong_parameters,
To declare that the value in params must be an array of permitted
scalar values map the key to an empty array:
params.permit(:id => [])

Rails - Parameter with multiple values in the URL when consuming an API via Active Resource

I am consuming an API that expects me to do requests in the following format:
?filter=value1&filter=value2
However, I am using Active Resource and when I specify the :params hash, I can't make the same parameter to appear twice in the URL, which I believe is correct. So I can't do this:
:params => {:consumer_id => self.id, :filter => "value1", :filter => "value2" }, because the second filter index of the hash will be ignored.
I know I can pass an array (which I believe is the correct way of doing it) like this:
:params => {:consumer_id => self.id, :filter => ["value1","value2"] }
Which will produce a URL like:
?filter[]=value1&filter[]=value2
Which to me seems ok, but the API is not accepting it. So my question are:
What is the correct way of passing parameters with multiple values? Is it language specific? Who decides this?
http://guides.rubyonrails.org/action_controller_overview.html#hash-and-array-parameters
Try :filter[] => value, :filter[] => value2
to create a valid query string, you can use
params = {a: 1, b: [1,2]}.to_query
http://apidock.com/rails/Hash/to_query
http://apidock.com/rails/Hash/to_param
You can generate query strings containing repeated parameters by making a hash that allows duplicate keys.
Because this relies on using object IDs as the hash key, you need to use strings instead of symbols, at least for the repeated keys.
(reference: Ruby Hash with duplicate keys?)
params = { consumer_id: 1 } # replace with self.id
params.compare_by_identity
params["filter"] = "value1"
params["filter"] = "value2"
params.to_query #=> "consumer_id=1&filter=value1&filter=value2"

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