Module: CodyRobbins::SaveChangesTo::InstanceMethods

Defined in:
lib/cody_robbins/save_changes_to/instance_methods.rb

Instance Method Summary collapse

Instance Method Details

#save_changes_to(name) ⇒ boolean

Updates the attributes of an instance of a model in an appropriately named instance variable in the controller with the attributes in params corresponding to the model name.

  • You pass the name of the model to update to the method.
  • The key in params assumed to contain the attributes of the model is extrapolated from the model name. For example, if the model is User then this key would be :user.
  • The instance variable that is updated is assumed to be named according to the model. For example, if the model is User then the instance variable will be @user.

Examples:

The following two actions are equivalent.


class UserController < ApplicationController
  # The usual Rails way.
  def update
    @user.update_attributes(params[:user])
  end

  # Using save-changes-to.
  def update
    save_changes_to(:user)
  end
end

Parameters:

  • name (Symbol, String) —

    The name of the model to update.

Returns:

  • (boolean) —

    Whether the update was successful.



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# File 'lib/cody_robbins/save_changes_to/instance_methods.rb', line 26

def save_changes_to(name)
  model = instance_variable(name)
  attributes = params[name]

  model.update_attributes(attributes)
end