rails controller invoking params of nested attributes

Question

Submitting the following parameters

Parameters: {[...] "physicalinventario"=>{[...] "physicalinventarioitems_attributes"=>{"0"=>{"quantity"=>",85"}}}, "commit"

The goal is to intercept the quantity parameter at the physicalinventarioitem controller create action, and sanitize it for possible comma as decimal value being input

if params[:physicalinventario][:physicalinventarioitems_attributes][:quantity].include? ","
  params[:physicalinventarioitem][:quantity] = params[:physicalinventario][:physicalinventarioitems_attributes][:quantity].tr!(',', '.').to_d
end

However, the syntax is wrong as no value after the comma is being handled.

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

@Alex answer is fine if you have only one quantity.

but what if you have multiple quantites,

eg: {"0"=>{"quantity"=>",85"},"1"=>{"quantity"=>",90"}}

So, here is the answer which also achieves that requirement for multiple nested attributes.

hash = {"physicalinventario"=>{"physicalinventarioitems_attributes"=>{"0"=>{"quantity"=>",85"},"1"=>{"quantity"=>",90"}}}}

The code that you require,

hash["physicalinventario"]["physicalinventarioitems_attributes"].each do |key, value|
    if value["quantity"].include? ","
    value["quantity"] = value["quantity"].tr!(',', '.').to_f
    end
end

Here is the resultant hash,

`{"physicalinventario"=>{"physicalinventarioitems_attributes"=>{"0"=>{"quantity"=>0.85}, "1"=>{"quantity"=>0.9}}}}`

edited Jun 20, 2020 at 9:12

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answered Nov 25, 2016 at 10:34

Sravan

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3 Comments

Sravan Over a year ago

@Jerome, please check this answer for multiple nested attributes.

Jerome Over a year ago

two observations. the first is that the code should be placed in the create action of the nesting record. Second, as stated, this is leading to a no implicit conversion of String into Integererror. params[:physicalinventario][:physicalinventarioitems_attributes].each do |key, value| will process properly.

Sravan Over a year ago

I used to_f there.

Community · Accepted Answer · 2017-05-23 12:13:47Z

0

Looks like you've missed ["0"] in the chain to get :quantity.

Should be

params[:physicalinventario][:physicalinventarioitems_attribu‌tes]["0"][:quantity]

Most convenient Rails way to sanitize(normalize) data in a model. To don't create duplicates, more here How best to sanitize fields in ruby on rails

edited May 23, 2017 at 12:13

CommunityBot

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answered Nov 25, 2016 at 10:09

Alex Kojin

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1 Comment

Jerome Over a year ago

the sequence identifier in the chain being missed I agree with. However, the submission is for multiple nested attributes; thus the digit cannot be invoked without being wrong for the subsequent physicalinventarioitems being submitted...

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