我有一个类似于梦幻足球应用程序的东西,我正试图启动并运行它。现在我有一个用户模型(使用设计):
class User < ActiveRecord::Base
has_many :league_memberships
has_many :leagues, through: :league_memberships
accepts_nested_attributes_for :league_memberships
有一个联盟模型:
class League < ActiveRecord::Base
has_many :league_memberships
has_many :users, through: :league_memberships
accepts_nested_attributes_for :league_memberships
还有 LeagueMembership 模型:
class LeagueMembership < ActiveRecord::Base
belongs_to :league
belongs_to :user
accepts_nested_attributes_for :user
accepts_nested_attributes_for :league
用户可以是多个联盟的成员,一个联盟可以有多个用户。
因此,当用户想要创建联赛时,他/她会这样做,然后可以编辑联赛以添加/删除其他用户。这是编辑联赛的表格:
= simple_form_for @league do |f|
.panel-body
.row
.col-md-4
= f.input :name, input_html: { class: 'form-control' }
= f.input :description, input_html: { class: 'form-control' }
.col-md-8
%h3 League Members
= f.simple_fields_for :league_memberships do |membership|
= render 'membership_fields', f: membership
= link_to_add_association 'Add Member', f, :league_memberships, class: 'btn btn-default'
= f.button :submit, class: 'btn btn-primary'
而“membership_fields”部分:
.nested-fields.col-md-8
= f.association :user, collection: User.order(:username), prompt: 'Choose a new member'
= link_to_remove_association "Remove member", f, class: "btn btn-default"
当我尝试编辑现有联赛时,它会引发 MissingTemplate 错误,并说它正在寻找另一个名为 _league_membership_fields 的部分。
我在这里想念什么?我浏览了大量的教程,要么我在某个地方有错字,要么我完全错过了我的数据建模方面的知识。
编辑:这是导致错误的行:
= link_to_add_association 'Add Member', f, :league_memberships, class: 'btn btn-default'
现在看来我也无法创建新的联赛了。这是 LeaguesController:
class LeaguesController < ApplicationController
def new
@leauge = League.new
@league.league_memberships.build
end
def create
@league = League.new(league_params)
@league.league_memberships.build(user_id: current_user.id)
if @league.save
redirect_to @league
else
render 'new'
end
end
def index
@leagues = Leagues.paginate(page: params[:page])
end
def show
@league = League.find(params[:id])
end
def edit
@league = League.find(params[:id])
end
def update
@league = League.find(params[:id])
if @league.update_attributes(league_params)
flash[:success] = "League Updated!"
redirect_to @league
else
render 'edit'
end
end
private
def league_params
params.require(:league).permit(
:name, :description,
users_attributes: [:id, :username, :name],
league_memberships_attributes: [:league_id, :user_id]
)
end
end