radio_button(object_name, method, tag_value, options = {}) public

Returns a radio button tag for accessing a specified attribute (identified by method) on an object assigned to the template (identified by object). If the current value of method is tag_value the radio button will be checked. Additional options on the input tag can be passed as a hash with options. Example (call, result). Imagine that @post.category returns "rails": 

  radio_button("post", "category", "rails")
  radio_button("post", "category", "java")
    <input type="radio" id="post_category" name="post[category]" value="rails" checked="checked" />
    <input type="radio" id="post_category" name="post[category]" value="java" />
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