在为新角色建立能力时，会创建6个异能（每个属性一个（STR，DEX，CON，WIS，INT，CHA），每个异能在Ability表中都有一个ID。我无法使用ability_id来保存对象。 （见字符#new controller）
在与这6个字段相关的视图表单中，我如何针对6种不同的统计数据单独标记它们？
模型
class Ability < ApplicationRecord
has_many :character_abilities
has_one :character
end
class CharacterAbility < ApplicationRecord
has_many :abilities
belongs_to :ability
belongs_to :character
end
class Character < ApplicationRecord
has_many :character_abilities
belongs_to :ability
accepts_nested_attributes_for :character_abilities
end
控制器
class CharactersController < ApplicationController
before_action :set_character, only: [:show, :edit, :update, :destroy]
def new
@character = Character.new
Ability.all.each do |ability|
@character.character_abilities.build(ability_id: ability.id)
#Ability Load (1.7ms) SELECT "abilities".* FROM "abilities"
#<Ability id: 1, name: "Strength", created_at: "2017-05-02 21:40:05", updated_at: "2017-05-02 21:40:05">,
#<Ability id: 2, name: "Dexterity", created_at: "2017-05-02 21:40:05", updated_at: "2017-05-02 21:40:05">,
#<Ability id: 3, name: "Constitution", created_at: "2017-05-02 21:40:05", updated_at: "2017-05-02 21:40:05">,
#<Ability id: 4, name: "Intelligence", created_at: "2017-05-02 21:40:05", updated_at: "2017-05-02 21:40:05">,
#<Ability id: 5, name: "Wisdom", created_at: "2017-05-02 21:40:05", updated_at: "2017-05-02 21:40:05">,
#<Ability id: 6, name: "Charisma", created_at: "2017-05-02 21:40:05", updated_at: "2017-05-02 21:40:05">]>
end
end
def edit
end
def create
@character = Character.new(character_params)
respond_to do |format|
if @character.save
format.html { redirect_to @character, notice: 'Character was successfully created.' }
format.json { render :show, status: :created, location: @character }
else
format.html { render :new }
format.json { render json: @character.errors, status: :unprocessable_entity }
end
end
end
def update
respond_to do |format|
if @character.update(character_params)
format.html { redirect_to @character, notice: 'Character was successfully updated.' }
format.json { render :show, status: :ok, location: @character }
else
format.html { render :edit }
format.json { render json: @character.errors, status: :unprocessable_entity }
end
end
end
private
def set_character
@character = Character.find(params[:id])
end
def character_params
params.require(:character).permit(:name, :experience, :archetype_id, :race_id, :age, :background_id, :class_id, :alignment_id, :speed, :health, :hitdie, character_abilities_attributes: [:id, :ability_id, :character_id, :score])
end
end
查看
<%= form_for(character) do |f| %>
<div class="field">
<%= f.label :name %>
<%= f.text_field :name %>
</div>
<%= f.fields_for :character_abilities do |ca| %>
<div class="field">
<%= ca.label :score %>
<%= ca.number_field :score %>
</div>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
Resulting table（图片）ids 19-24
Rails控制台
Started POST "/characters" for 127.0.0.1 at 2017-05-03 00:01:11 -0400
Processing by CharactersController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"TMcpNrVvp5mlsN8iP6ndvNIlBX9WNE5KYGxYxA9oUP/2K8jsJOqw4zLTT/a7+6Vp54r4NeSLpBxaXfh269TZIw==", "character"=>{"name"=>"Tester", "experience"=>"123", "race_id"=>"2", "age"=>"123", "background_id"=>"2", "archetype_id"=>"4", "alignment_id"=>"1", "health"=>"12", "character_abilities_attributes"=>{"0"=>{"score"=>"10"}, "1"=>{"score"=>"10"}, "2"=>{"score"=>"10"}, "3"=>{"score"=>"10"}, "4"=>{"score"=>"10"}, "5"=>{"score"=>"10"}}}, "commit"=>"Create Character"}
(0.1ms) begin transaction
Alignment Load (0.2ms) SELECT "alignments".* FROM "alignments" WHERE "alignments"."id" = ? LIMIT ? [["id", 1], ["LIMIT", 1]]
Archetype Load (0.1ms) SELECT "archetypes".* FROM "archetypes" WHERE "archetypes"."id" = ? LIMIT ? [["id", 4], ["LIMIT", 1]]
Background Load (0.1ms) SELECT "backgrounds".* FROM "backgrounds" WHERE "backgrounds"."id" = ? LIMIT ? [["id", 2], ["LIMIT", 1]]
Race Load (0.1ms) SELECT "races".* FROM "races" WHERE "races"."id" = ? LIMIT ? [["id", 2], ["LIMIT", 1]]
SQL (0.3ms) INSERT INTO "characters" ("experience", "race_id", "age", "background_id", "archetype_id", "alignment_id", "health", "created_at", "updated_at", "name") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) [["experience", 123], ["race_id", 2], ["age", 123], ["background_id", 2], ["archetype_id", 4], ["alignment_id", 1], ["health", 12], ["created_at", 2017-05-03 04:01:11 UTC], ["updated_at", 2017-05-03 04:01:11 UTC], ["name", "Tester"]]
SQL (0.2ms) INSERT INTO "character_abilities" ("character_id", "score", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["character_id", 4], ["score", 10], ["created_at", 2017-05-03 04:01:11 UTC], ["updated_at", 2017-05-03 04:01:11 UTC]]
SQL (0.1ms) INSERT INTO "character_abilities" ("character_id", "score", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["character_id", 4], ["score", 10], ["created_at", 2017-05-03 04:01:11 UTC], ["updated_at", 2017-05-03 04:01:11 UTC]]
SQL (0.1ms) INSERT INTO "character_abilities" ("character_id", "score", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["character_id", 4], ["score", 10], ["created_at", 2017-05-03 04:01:11 UTC], ["updated_at", 2017-05-03 04:01:11 UTC]]
SQL (0.2ms) INSERT INTO "character_abilities" ("character_id", "score", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["character_id", 4], ["score", 10], ["created_at", 2017-05-03 04:01:11 UTC], ["updated_at", 2017-05-03 04:01:11 UTC]]
SQL (0.1ms) INSERT INTO "character_abilities" ("character_id", "score", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["character_id", 4], ["score", 10], ["created_at", 2017-05-03 04:01:11 UTC], ["updated_at", 2017-05-03 04:01:11 UTC]]
SQL (0.1ms) INSERT INTO "character_abilities" ("character_id", "score", "created_at", "updated_at") VALUES (?, ?, ?, ?) [["character_id", 4], ["score", 10], ["created_at", 2017-05-03 04:01:11 UTC], ["updated_at", 2017-05-03 04:01:11 UTC]]
(10.2ms) commit transaction
Redirected to http://localhost:8080/characters/4
Completed 302 Found in 41ms (ActiveRecord: 11.9ms)