Rails - 表单问题
在我的应用程序中,我有 3 个这样的模型:
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 页面中创建一个按钮,允许该人员请求 group_membership。根据上一个问题的建议,我在 Group_Membership 控制器上创建了一个 def create_membership
:
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
所以我转到我的表单,在 group#show 视图上,我做了如下操作:
<%= 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,它会将我重定向到创建新组的表单,而不是 Group_Membership。有什么提示吗? 提前致谢。
########编辑##########
好吧,我将我的代码更改为如下所示:
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:
<% form_for(:group_membership, :url => group_memberships_path(:member_id => current_person, :group_id => @group.id)) do |f| %> <%=submit_tag“加入!” %>
现在我可以实际创建一个 group_membership 模型,但是数据库列 member_id
和 group_id
中的两个 id 都添加为空白。
如果我将行 @group_membership = Group_Membership.create(params[:group_membership])
更改为 @group_membership = Group.Group_Membership.create(params[:group_membership])
,我能够保存组 ID。如果我更改为 Person.
,情况也是如此。
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"
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
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 %>
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##########
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
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!" %>
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
.
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.
.
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只是为了清理一下
这段代码应该在 Rails 3 中工作我不确定早期版本
just to clean up a bit
this code should work in rails 3 I'm not sure about earlier versions