我需要创建一个进入连接表的选择标记列表。我创建了这个循环
- @game_details.fighting_game_main_characters.each do |main_character|
= simple_fields_for :combo_book_combo_works do |works|
= main_character.name
= works.input :fighting_game_main_character_id, as: :hidden,
input_html: {value: main_character.id}
= works.select :test, ["Works", "Doesn't Work", "Untested"], {},
selected: "Untested", class: "form-control"
添加它按预期显示。当我点击提交它不会写入连接表。我查看了日志，发现只有最后一个选择标签位于提交的参数中
Parameters:
{
"utf8"=>"✓",
"combo_book_combo"=>{
"combo_book_combo_characters_attributes"=>
{"0"=>{"fighting_game_main_character_id"=>"1"}
},
"combo_type"=>"Combo",
"character_positions"=>"Ground to Ground",
"screen_position"=>"Midscreen",
"combo"=>"ô"
},
"keyboard-select"=>"",
"combo_book_combo_works"=>{
"fighting_game_main_character_id"=>"13",
"test"=>"Works"},
"commit"=>"Add combo"
}
我看起来是一个页面源，看到所有的选择都有相同的ID，所以我添加了
id: "combo_book_combo_works_#{main_character.id}"
但这并没有解决问题，因为它仍然没有写入连接表，所以我看了模型
class ComboBookCombo < ApplicationRecord
has_many :combo_book_combo_characters
has_many :fighting_game_main_characters, through: :combo_book_combo_characters
has_many :combo_book_combo_assists
has_many :fighting_game_assist_characters, through: :combo_book_combo_assists
has_many :combo_book_combo_character_extras
has_many :fighting_game_main_character_extras, through: :combo_book_combo_character_extras
has_many :combo_book_combo_works
has_many :fighting_game_main_characters, through: :combo_book_combo_works
has_many :combo_book_combo_extras
has_many :fighting_game_extras, through: :combo_book_combo_extras
validates :combo, :combo_type, :character_positions, :screen_position, presence: true
accepts_nested_attributes_for :combo_book_combo_characters, reject_if: proc { |attributes| attributes['fighting_game_main_character_id'].blank? }, allow_destroy: true
accepts_nested_attributes_for :combo_book_combo_assists, reject_if: proc { |attributes| attributes['fighting_game_assist_character_id'].blank? }, allow_destroy: true
accepts_nested_attributes_for :combo_book_combo_character_extras, reject_if: proc { |attributes| attributes['fighting_game_charater_extra_id'].blank? }, allow_destroy: true
accepts_nested_attributes_for :combo_book_combo_extras, reject_if: proc { |attributes| attributes['fighting_game_extra_id'].blank? }, allow_destroy: true
accepts_nested_attributes_for :combo_book_combo_works, reject_if: proc { |attributes| attributes['fighting_game_main_charater_id'].blank? }, allow_destroy: true
belongs_to :combo_book_user
end
class ComboBookComboWork < ApplicationRecord
belongs_to :combo_book_combo, optional: true
belongs_to :fighting_game_main_character
end
class FightingGameMainCharacter < ApplicationRecord
belongs_to :fighting_game
has_many :fighting_game_main_character_extras
has_many :combo_book_combo_characters
has_many :combo_book_combos, through: :combo_book_combo_characters
has_many :combo_book_combo_works
has_many :combo_book_combos, through: :combo_book_combo_works
end
然后是控制器
def create
@combo_book_combo = current_combo_book_user.combo_book_combos.build(combo_book_combo_params)
if @combo_book_combo.save
render 'index', notice: "Successfully created combo"
else
render 'index', notice: "Error creating combo"
end
end
和所需的参数
def combo_book_combo_params
params.require(:combo_book_combo).permit(
:fighting_game_main_character_id,
:combo,
:combo_type,
:character_positions,
:combo_type,
:screen_position,
combo_book_combo_assists_attributes: [:id, :fighting_game_assist_character_id, :combo_book_combo_id, :_destroy],
combo_book_combo_character_extras_attributes: [:id, :combo_book_combo_id, :fighting_game_id, :_destroy],
combo_book_combo_extras_attributes:[:id, :combo_book_combo_id, :fighting_game_extra_id, :_destroy],
combo_book_combo_characters_attributes:[:id, :fighting_game_main_character_id, :combo_book_combo_id, :_destroy],
combo_book_combo_works_attributes:[:id, :combo_book_combo_id, :fighting_game_main_character_id, :test]
)
end
并且一切似乎都很好但是当我再次提交时我得到了
ComboBookUser Load (0.5ms) SELECT "combo_book_users".* FROM "combo_book_users" WHERE "combo_book_users"."id" = $1 ORDER BY "combo_book_users"."id" ASC LIMIT $2 [["id", 2], ["LIMIT", 1]]
(0.1ms) BEGIN
SQL (0.6ms) INSERT INTO "combo_book_combos" ("combo", "combo_type", "character_positions", "screen_position", "created_at", "updated_at", "combo_book_user_id") VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING "id" [["combo", "ô"], ["combo_type", "Combo"], ["character_positions", "Ground to Ground"], ["screen_position", "Midscreen"], ["created_at", 2016-11-26 19:48:19 UTC], ["updated_at", 2016-11-26 19:48:19 UTC], ["combo_book_user_id", "2"]]
SQL (0.4ms) INSERT INTO "combo_book_combo_characters" ("combo_book_combo_id", "fighting_game_main_character_id", "created_at", "updated_at") VALUES ($1, $2, $3, $4) RETURNING "id" [["combo_book_combo_id", 52], ["fighting_game_main_character_id", 1], ["created_at", 2016-11-26 19:48:19 UTC], ["updated_at", 2016-11-26 19:48:19 UTC]]
(2.3ms) COMMIT
Rendering combo_book_combos/index.html.haml within layouts/application
Rendered combo_book_combos/index.html.haml within layouts/application (1.6ms)
Completed 200 OK in 76ms (Views: 61.7ms | ActiveRecord: 4.0ms)
需要写入的联接未显示。我需要做些什么才能使循环生成的所有选择标签写入连接表？
答案 0 :(得分：0)
您的控制器希望所有参数都作为combo_book_combo值下的嵌套值传入。这就是这种方法的目的：
def combo_book_combo_params
params.require(:combo_book_combo).permit(
:fighting_game_main_character_id,
:combo, :combo_type,
:character_positions,
:combo_type,
:screen_position,
combo_book_combo_assists_attributes: [
:id,
:fighting_game_assist_character_id,
:combo_book_combo_id,
:_destroy],
combo_book_combo_character_extras_attributes: [
:id,
:combo_book_combo_id,
:fighting_game_id,
:_destroy],
combo_book_combo_extras_attributes:[
:id,
:combo_book_combo_id,
:fighting_game_extra_id,
:_destroy],
# etc
)
end
这是您的参数目前的样子：
{
"combo_book_combo"=>{
"combo_book_combo_characters_attributes"=>{
"0"=>{"fighting_game_main_character_id"=>"1"}
},
"combo_type"=>"Combo",
"character_positions"=>"Ground to Ground",
"screen_position"=>"Midscreen",
"combo"=>"ô"
},
"combo_book_combo_works"=>{
"fighting_game_main_character_id"=>"13",
"test"=>"Works"
},
}
这是您的控制器期望您的参数的样子：
{
"combo_book_combo"=>{
"combo_book_combo_characters_attributes"=>{
"0"=>{"fighting_game_main_character_id"=>"1"}
},
"combo_type"=>"Combo",
"character_positions"=>"Ground to Ground",
"screen_position"=>"Midscreen",
"combo"=>"ô",
"combo_book_combo_works_attributes"=>{
"fighting_game_main_character_id"=>"13",
"test"=>"Works"
},
},
}
请注意，combo_book_combo_works已移动 combo_book_combo参数，和密钥已更改为combo_book_combo_works_attributes。
立即查看您的表单，尤其是combo_book_combo_characters_attributes的位 - 看起来表单的一部分是使用嵌套表单属性正确构建的。您可能会更改simple_fields_for，以便它是在父表单上调用的方法（类似于f.simple_fields_for），而不是独立的视图帮助方法调用。