how to add new field to mechanize form (ruby/mechanize)

Question

there is a public class method to add field to mechanize form I tried .. ``` #login_form.field.new('auth_login','Login') #login_form.field.new('auth_login','Login') ``` and both gives me an error `undefined method "new" for #<WWW::Mechanize::Form::Field:0x3683cbc> (NoMethodError)` I tried `login_form.field.new('auth_login','Login')` which gives me an error ``` mechanize-0.9.3/lib/www/mechanize/page.rb:13 n `meta': undefined method `search' for nil:NilClass (NoMethodError) ``` but at the time I submit the form. The field does not exist in html source. I want to add it so POST query sent by my script will contain `auth_username=myusername&auth_password=mypassword&auth_login=Login` So far it sends only `auth_username=radek&auth_password=mypassword` which might be why I cannot get logged in. Just my thought. The script looks like ``` require 'rubygems' require 'mechanize' require 'logger' agent = WWW::Mechanize.new {|a| a.log = Logger.new("loginYOTA.log") } agent.follow_meta_refresh = tru…

Accepted Answer

I think what you're looking for is

```
login_form.add_field!(field_name, value = nil)
```

Here are the docs:

http://rdoc.info/projects/tenderlove/mechanize

The difference between this and the method WWW::Mechanize::Form::Field.new is not much, aside from the fact that there aren't many ways to add fields to a form. Here's how the add_field! method is implemented....you can see that it's exactly what you'd expect. It instantiates a Field object, then adds it to the form's 'fields' array. You wouldn't be able to do this in your code because the method "fields<<" is a private method inside "Form."

```
# File lib/www/mechanize/form.rb, line 65
  def add_field!(field_name, value = nil)
    fields << Field.new(field_name, value)
  end
```

On a side note, according to the docs you should be able to do the first variation you proposed:

```
login_form['field_name']='value'
```

Hope this helps!

how to add new field to mechanize form (ruby/mechanize)

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