Question

I want to get the message from the errors array for a field.

Example for the password field:

   @user.errors.select{|key,msg| key == :password}

This produces:

{:password=>["Your password and confirmation are not the same"]}

What I want is a way to just get the message for the field.

How can I do this?

Answer 1

Just use @user.errors[:password]

Alternatively you can use one of the following methods

hsh.values → array
Returns a new array populated with the values from hsh. See also Hash#keys.

h = { "a" => 100, "b" => 200, "c" => 300 }
h.values   #=> [100, 200, 300]

hsh.values_at(key, …) → array
Return an array containing the values associated with the given keys. Also see Hash.select.

h = { "cat" => "feline", "dog" => "canine", "cow" => "bovine" }
h.values_at("cow", "cat")  #=> ["bovine", "feline"]

edit:

Using the values method you could do this

@user.errors.select{|key,msg| key == :password}.values.first

It depends on what you need. Keep in mind that any errors value is an array itself because a form field could have more than one error. Try it yourself with rails console

> pry
pry(main)> {:password=>["Your password and confirmation are not the same"]}
=> {:password=>["Your password and confirmation are not the same"]}
pry(main)> {:password=>["Your password and confirmation are not the same"]}.values
=> [["Your password and confirmation are not the same"]]
pry(main)> {:password=>["Your password and confirmation are not the same"]}.values.first
=> ["Your password and confirmation are not the same"]
pry(main)> {:password=>["Your password and confirmation are not the same"]}.values.first.first
=> "Your password and confirmation are not the same"