我是Rails的新手并且正在努力获得一个用于保存的formtastic形式 - 数据库不断回滚插入而没有任何明显的解释。
我有一个PublishedItem和一个Citation。每个PublishedItem都可以通过Citation对其他PublishedItems进行多次引用 - 这里是(剥离的)PublishedItem模型:
class PublishedItem < ActiveRecord::Base
attr_accessible :date_published,
:author_ids,
:cited_published_item_ids,
:citing_published_item_ids
has_many :authorships
has_many :authors, through: :authorships, order: "last_name, first_name"
has_many :citations,
foreign_key: "citing_published_item_id",
class_name: "Citation",
dependent: :destroy
has_many :cited_published_items,
through: :citations,
source: :cited
has_many :reverse_citations,
foreign_key: "cited_published_item_id",
class_name: "Citation",
dependent: :destroy
has_many :citing_published_items,
through: :reverse_citations,
source: :citing
还有其他关系,但我只包含一个用于比较目的:作者关系,与另一个表更典型的关系,作者保存得当。这只是我自己有问题的自我引用。
以下是引文模型:
class Citation < ActiveRecord::Base
attr_accessible :citation_type, :cited_id, :citing_id
belongs_to :citing,
class_name: "PublishedItem",
foreign_key: "citing_published_item_id"
belongs_to :cited,
class_name: "PublishedItem",
foreign_key: "cited_published_item_id"
表(postgresql):
CREATE TABLE citations
(
id serial NOT NULL,
citing_published_item_id integer,
cited_published_item_id integer,
citation_type character varying(255),
created_at timestamp without time zone NOT NULL,
updated_at timestamp without time zone NOT NULL,
CONSTRAINT published_item_citations_pkey PRIMARY KEY (id )
)
WITH (
OIDS=FALSE
);
new.html.erb表单(摘录):
<%= semantic_form_for @published_item do |f| %>
<%= f.semantic_errors %>
<%= f.inputs do %>
<%= f.input :title %>
<%= f.input :authors, as: :select,
collection: Author.find(:all, order: "last_name ASC, first_name ASC") %>
<%= f.input :cited_published_items, as: :select,
collection: PublishedItem.find(:all, order: "title ASC") %>
<% end %>
<%= f.actions do %>
<%= f.action :submit, button_html: { class: "btn btn-primary" } %>
<%= f.action :cancel, button_html: { class: "btn btn-default" } %>
<% end %>
我希望发生并且似乎无法实现的是引用另一个传递给新的PublishedItem表单的PublishedItem,并将记录插入到Citations中,原始的PublishedItem为referenced_published_item,新的PublishedItem为citing_published_item 。但我很难过。每当我在选择列表中选择一个PublishedItem时,查询就会回滚。作者(和其他M:M)正常工作。
非常感谢任何帮助。
答案 0 :(得分:1)
尝试这样的事情 -
控制器:
def new
@published_item = PublishedItem.new
@published_item.citations.build
end
PublishedItem模型:
accepts_nested_attributes_for :citations
# i noticed your accessible foreign keys were set wrong here
attr_accessible :citation_type,
:cited_published_item_id,
:citing_published_item_id
表格:
<%= semantic_form_for @published_item do |form| %>
# published_item fields
<%= form.fields_for :citations do |citation_subform| %>
<%= citation_subform.select :cited_published_item_id,
options_for_select(
PublishedItem.order(:title).map{|p|[p.title,p.id]}
) %>
<% end %>
<% end %>
你希望你的表单能够传递这样的结构:
{published_item :
{citations_attributes:
[
{cited_published_item_id: xxx}
]
}
}