从 select_tag 保存数据
尝试将数据从表单保存到数据库。 使用 select_tag
<%= select_tag :size, options_from_collection_for_select(@plan, 'name', 'size') %>
一切都很好，它同时获取 size 和 email ，但是当我尝试存储表单（size）中的数据时，它传递了 NULL。
这是我的控制台：
Started POST "/users" for 127.0.0.1 at 2011-06-24 07:25:29 -0500
Processing by UserController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"MfT3gs5TtR+bvpaLro0E8Qm1zojaY2ms9WK0WprKPAw=", "size"=>"small",
"user"=>{"email"=>"[email protected]"}, "commit"=>"Create User"}
AREL (0.4ms) INSERT INTO "users" ("email", "size", "created_at", "updated_at") VALUES
('[email protected]', NULL, '2011-06-24 12:25:29.646814', '2011-06-24 12:25:29.646814')
Redirected to http://localhost:3000/users/14
Completed 302 Found in 56ms
所以，它从表单中获取正确的数据，如您所见“size”=>“small”，但是当需要存储它时，它将它作为 NULL 传递，
VALUES ('[email protected]', NULL, '2011-06-24
我想，这是 select_tag，因为它没有附加 u，就像 text_field 一样
<%= form_for @user do |u| %>
<%= render 'shared/error_messages' %>
<p><%= u.label :size, 'How many employees do you have?' %>: </p>
<p><%= select_tag :size, options_from_collection_for_select(@plan, 'name', 'size') %></p>
<p><%= u.label :email, 'What\'s your email address?' %>:</p>
<p><%= u.text_field :email %></p>
<%= u.submit%>
<% end %>
但是当我尝试 u.select_tag = 错误时，未定义方法。
我的模型
class User < ActiveRecord::Base
attr_accessible :size, :email
end
有什么想法吗？
Trying to save data from a form to the database.
Using the select_tag
<%= select_tag :size, options_from_collection_for_select(@plan, 'name', 'size') %>
Everything is fine, it grabs both size and email ,but when I try to store the data from the form (size), it passes NULL.
Here's my console:
Started POST "/users" for 127.0.0.1 at 2011-06-24 07:25:29 -0500
Processing by UserController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"MfT3gs5TtR+bvpaLro0E8Qm1zojaY2ms9WK0WprKPAw=", "size"=>"small",
"user"=>{"email"=>"[email protected]"}, "commit"=>"Create User"}
AREL (0.4ms) INSERT INTO "users" ("email", "size", "created_at", "updated_at") VALUES
('[email protected]', NULL, '2011-06-24 12:25:29.646814', '2011-06-24 12:25:29.646814')
Redirected to http://localhost:3000/users/14
Completed 302 Found in 56ms
So, It gets the correct data from the form, as you see "size"=>"small", but when its time to store it, it passes it as NULL,
VALUES ('[email protected]', NULL, '2011-06-24
I thought, it was the select_tag, as it doesnt have u attached, as text_field does
<%= form_for @user do |u| %>
<%= render 'shared/error_messages' %>
<p><%= u.label :size, 'How many employees do you have?' %>: </p>
<p><%= select_tag :size, options_from_collection_for_select(@plan, 'name', 'size') %></p>
<p><%= u.label :email, 'What\'s your email address?' %>:</p>
<p><%= u.text_field :email %></p>
<%= u.submit%>
<% end %>
But when I tried u.select_tag = Error, undefined method.
My model
class User < ActiveRecord::Base
attr_accessible :size, :email
end
Any thoughts?
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您需要将“size”参数嵌套在“users”哈希中。当您查看日志时，您想要验证是否看到类似这样的内容：
要在表单内部实现这一点，您可以保留现有的 select_tag 并将其范围设置为这样：
或者对于这种情况，您似乎可以使用 collection_select 范围在表单对象上：
You need to have the "size" param nested inside of the "users" hash. When you look in the log you want to verify seeing something like this:
To achieve that inside of of your form for, you can keep your existing select_tag and scope it as such:
Or you for this case it looks like you could use collection_select scoped on the form object: