Update params with passed value

Question

I would like to create a generic method to update certain params of my model.

Example:

@parameter = "name"

User.update(@parameter: "new name here")

So here I would like to update the column "name" with the value "new name here". But this method isn't working. Any Idea of how I should do it?

You tagged your question with [ruby-on-rails]. Are you trying to do this in a Ruby on Rails model class? — Richard-Degenne, Jun 24 '19 at 16:11
No just into my controller to access to external values like params[:something] — jacques Mesnet, Jun 24 '19 at 16:15
I'm not sure to understand. Can you update your question with what you are actually trying to do? I think we're facing a case of [XY problem](https://en.wikipedia.org/wiki/XY_problem) here. — Richard-Degenne, Jun 24 '19 at 16:17

spike · Accepted Answer · 2019-06-24T16:24:09.400

1

You can only use the { x: foo } hash syntax when the keys are literals in the source code (like :x in that example). If you want to use the value of a variable as the key to a hash you have to use the old style hashrocket syntax like this:

  User.update(@parameter => "new name here")

(That's not strictly the only way to do it, see this answer for more: Creating a hash key from a variable in Ruby?)

edited Jun 24 '19 at 16:24

answered Jun 24 '19 at 16:20

spike

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@Archer do you mean "#{@parameter}" ? – spike Jun 24 '19 at 18:00
Due to typo... This version is also possible: User.update("#{@parameter}": "new name here") – Archer Jun 24 '19 at 18:35

Update params with passed value

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