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Rails中两种不同的表单处理方式
1.表单类型一
<div class=""class="form">
<%= error_messages_for 'user' %><fieldset><legend>请输入用户信息</legend><% form_for :user do |form| %><p>Name: <%= form.text_field :username, :size => 30 %></p><p>Password: <%= form.password_field :password, :size => 30 %></p><p>ConfirmPassword: <%= form.password_field :password_confirmation, :size => 30 %></p><%= submit_tag "注册", :class => "submit" %><% end %></fieldset></div>此种是对象绑定的方式，通过表单，跟Model层的对象绑定，通常完成数据的增，改功能。2.表单类型二
<div class=""class="form">
<%= error_messages_for 'user' %><fieldset><legend>请输入用户信息</legend><% form_tag do %><p>Name: <%= text_field_tag :username, params[:username], :size => 30 %></p><p>Password: <%= password_field_tag :password, params[:password], :size => 30 %></p><%= submit_tag "注册", :class => "submit" %><% end %></fieldset></div>此种主要是为了表单传值form_for和model绑定，而form_tag不是 form_tag想传什么参数都行，没有约束==================[以下内容转自网络]===================================
表单开始标签:
<%= form_tag { :action => :save }, { :method => :post } %>Use :multipart => true to define a Mime-Multipart form (for file uploads) 表单结束标签:<%= end_form_tag %>文本框 Text fields<%= text_field :modelname, :attribute_name, options %>
生成:<input type="text" name="modelname[attribute_name]" id="attributename" />实例:
text_field "post", "title", "size" => 20<input type="text" id="post_title" name="post[title]" size="20" value="}" />隐藏框:
<%= hidden_field ... %>密码框:
<%= password_field ... %>文件框
<%= file_field ... %>Rails Textarea框
<%= text_area ... %>实例:text_area "post", "body", "cols" => 20, "rows" => 40<textarea cols="20" rows="40" id="post_body" name="post[body]">}</textarea>单选框 Radio Buttons<%= radio_button :modelname, :attribute, :tag_value, options %>
实例: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" />多选框 Check Box
<%= check_box :modelname, :attribute, options, on_value, off_value %>实例check_box "post", "validated" # post.validated? returns 1 or 0<input type="checkbox" id="post_validate" name="post[validated]" value="1" checked="checked" /><input name="post[validated]" type="hidden" value="0" />check_box "puppy", "gooddog", {}, "yes", "no"
<input type="checkbox" id="puppy_gooddog" name="puppy[gooddog]" value="yes" /><input name="puppy[gooddog]" type="hidden" value="no" /><%= select :variable, :attribute, choices, options, html_options %>
下拉菜单框 Select Menu
select "post", "person_id", Person.find_all.collect {|p| [ p.name, p.id ] },{ :include_blank => true }<select name="post[person_id]">
<option></option><option value="1" selected="selected">David</option><option value="2">Sam</option><option value="3">Tobias</option></select>Collection Selection
<%= collection_select :variable, :attribute, choices, :id, :value %>日期选择框:
<%= date_select :variable, :attribute, options %><%= datetime_select :variable, :attribute, options %>实例:date_select "post", "written_on"date_select "user", "birthday", :start_year => 1910date_select "user", "cc_date", :start_year => 2005,:use_month_numbers => true,:discard_day => true,:order => [:year, :month]datetime_select "post", "written_on"
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