rails is processing trash html codes - ruby-on-rails

Question

This is the rails form helper code,
<%= form_tag({ :action => "create"}, :method => "POST", :id=>"login") do -%>
<h1>Log In</h1>
<fieldset id="inputs">
<%= text_field :username, :placeholder => 'Username', :autofocus=>true%>
<%= password_field_tag :userpass, params[:userpass], placeholder: 'Password', id:'password'%>
</fieldset>
<fieldset id="actions">
<input type="submit" id="submit" value="Log in">
Register
</fieldset>
<% end %>
and this is the html code, what i want,
<form action="/login/create" method="post" id="login" >
<h1>LogIn</h1>
<fieldset id="inputs">
<input id="username" type="text" name ="username" placeholder="Username" autofocus required>
<input id="password" type="password" name="userpass" placeholder="Password" required>
</fieldset>
<fieldset id="actions">
<input type="submit" id="submit" value="Log in" name="apply">
Register
</fieldset>
</form>
However, if i run the rails code, it makes the code like this,
<input id="username_{:placeholder=>"Username", :autofocus=>true}" name="username[{:placeholder=>"Username", :autofocus=>true}]" size="30" type="text">
Somebody knows what the problem is?

Answer 1

You'll want to use text_field_tag in your form, not just text_field:
<%= form_tag({ :action => "create"}, :method => "POST", :id=>"login") do -%>
<h1>Log In</h1>
<fieldset id="inputs">
<%= text_field_tag :username, params[:username], { :placeholder => 'Username', :autofocus => true } %>
<%= password_field_tag :userpass, params[:userpass], placeholder: 'Password', id:'password'%>
</fieldset>
<fieldset id="actions">
<input type="submit" id="submit" value="Log in">
Register
</fieldset>
<% end %>
You should also look into field_set_tag - that may save you some headaches if you're expecting to use the HTML fieldset tag.