Rails-表单问题 [英] Rails - Form problems
问题描述
在我的应用中,我有3种这样的模型:
In my app I have 3 models like that:
class Person
has_many :groups
has_many :group_memberships, :foreign_key => "member_id"
end
class Group_Membership
belongs_to :member, :class_name => 'Person'
belongs_to :group
end
class Group
belongs_to :person
has_many :group_memberships
has_many :members, :class_name => "Person", :through => "group_memberships", :foreign_key => "member_id"
我需要的是在group#show页面上创建一个按钮,该按钮可以使Person询问group_membership.根据上一个问题的建议,我在Group_Membership控制器上设置了def create_membership
:
What I need is to create a button in the group#show page, that allows the Person to ask for the group_membership. By suggestion from a previous question I made a def create_membership
on my Group_Membership controller:
def create_membership
@group = Group.find params[:id]
if @group.group_memberships.create( :member_id => params[:member_id])
redirect_to @group
else
render :action => 'show'
end
end
因此,我进入了组#show视图上的表单,并按照以下步骤操作:
So I moved on to my form, on the group#show view, and I did as follow:
<%= form_for :group_membership, @group_membership, :url => { :action => "create_membership" } do |f| %>
<%= submit_tag "Create" %>
<% end %>
但是每次我单击按钮时,它会将我重定向到表单以创建一个新的组,而不是Group_Membership.有什么提示吗? 预先感谢.
But everytime I click on the button, it redirects me to the form to create a new Group, not Group_Membership. Any hints? Thanks in advance.
######## EDIT #########
好吧,我有点将代码更改为如下代码:
Well, I kinda changed my code to something like this:
def create
@person = Person.find(current_person)
@group = Group.find(params[:group_id])
params[:group_membership] = {:member_id => @person.id, :group_id => @group.id}
@group_membership = Group_Membership.create(params[:group_membership])
if @group_membership.save
redirect_to @person
else
redirect_to @person
end
end
我的表单现在是这样的:
And my form is right now like that:
<% form_for(:group_membership, :url => group_memberships_path(:member_id => current_person, :group_id => @group.id)) do |f| %>
<%= submit_tag "Join!" %>
<% form_for(:group_membership, :url => group_memberships_path(:member_id => current_person, :group_id => @group.id)) do |f| %>
<%= submit_tag "Join!" %>
现在我可以实际创建一个group_membership模型,但是两个ID都在数据库列member_id
和group_id
中添加为空白.
Now I'm able to actually create a group_membership model, but both id's are added blank in database column member_id
and group_id
.
如果将行@group_membership = Group_Membership.create(params[:group_membership])
更改为@group_membership = Group.Group_Membership.create(params[:group_membership])
,则可以保存组ID.如果更改为Person.
,同样如此.
If I change the line @group_membership = Group_Membership.create(params[:group_membership])
to @group_membership = Group.Group_Membership.create(params[:group_membership])
, I'm able to get group id saved. Same goes if I change to Person.
.
推荐答案
只是要清理一下
def create
@group_membership = Group_Membership.create(:group => Group.find(params[:group_id]), :member => Person.find(current_person))
if @group_membership.save
redirect_to @person
else
redirect_to @person
end
end
此代码应可在rails 3中使用我不确定较早的版本
this code should work in rails 3 I'm not sure about earlier versions
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