我试图从同一个表单一次创建多个对象：
<div class="container">
<%= form_tag store_opening_hours_create_path do %>
<% @opening_hour.each do |hour| %>
<%= fields_for 'opening_hour = []', hour do |p|%>
<div class="row">
<table class="table">
<thead>
<tr>
<th>Select a day</th>
<th>Opens at</th>
<th>Closes at</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<%= p.select :day, [['Monday', 1], ['Tuesday', 2], ['Wednesday', 3],
['Thursday', 4], ['Friday', 5], ['Saturday', 6],['Sunday', 7]], {}, class: "form-control" %>
</td>
<td>
<%= p.select :opens, [['12:00AM', 12], ['13:00PM', 13], ['14:00PM', 14], ['15:00PM', 15], ['16:00PM', 16], ['17:00PM', 17],
['18:00PM', 18], ['19:00PM', 19], ['20:00PM', 20], ['21:00PM', 21], ['22:00PM', 22], ['23:00PM', 23], ['24:00PM', 24],
['01:00AM', 1], ['02:00AM', 2], ['03:00AM', 3], ['04:00AM', 4], ['05:00AM', 5], ['06:00AM', 6], ['07:00AM', 7],
['08:00AM', 8], ['09:00AM', 9], ['10:00AM', 10], ['11:00AM', 11], ['00:00', 0]],
{}, class: "form-control" %>
</td>
<td>
<%= p.select :closes, [['12:00AM', 12], ['13:00PM', 13], ['14:00PM', 14], ['15:00PM', 15], ['16:00PM', 16], ['17:00PM', 17],
['18:00PM', 18], ['19:00PM', 19], ['20:00PM', 20], ['21:00PM', 21], ['22:00PM', 22], ['23:00PM', 23], ['24:00PM', 24],
['01:00AM', 1], ['02:00AM', 2], ['03:00AM', 3], ['04:00AM', 4], ['05:00AM', 5], ['06:00AM', 6], ['07:00AM', 7],
['08:00AM', 8], ['09:00AM', 9], ['10:00AM', 10], ['11:00AM', 11], ['00:00', 0]],
{}, class: "form-control" %>
</td>
</tr>
<%= p.hidden_field :store_id, value: current_store.id %>
<% end %>
<% end %>
</tbody>
</table>
</div>
<%= submit_tag 'Submit, %>
<% end %>
</div>
这就是控制器内部的内容：
def new
@opening_hour = []
7.times do
@opening_hour << OpeningHour.new
end
render :template => "stores/opening_hours/new"
end
def create
params["opening_hour"].each do |hour|
if hour["day"] != "" || hour["closes"] != "" || hour["opens"] != ""
OpeningHour.create(opening_hour_params(hour))
redirect_to(root_path)
return
end
end
end
def opening_hour_params(my_params)
my_params.permit(:store_id, :day, :closes, :opens, :valid_from, :valid_through)
end
但是当我点击提交时，我收到以下错误：
OpeningHoursController中的NoMethodError＃创建未定义的方法＆＃39;每个＆＃39;为零：NilClass
这就是我在rails控制台中的内容：
Started POST "/store/opening_hours/create" for 127.0.0.1 at 2018-02-23 12:04:07 +0200
Processing by OpeningHoursController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"pQP2xegYmfllUQUpHsWzqy7sEanpMA5cV5Kaiye1s7ogunQ2Et3oKKZnKr7VAsebpp6bxQuDbH07eCJHp4bSdQ==", "opening_hour = "=>[{"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}], "commit"=>"Submit"}
Completed 401 Unauthorized in 2ms (ActiveRecord: 0.0ms)
NoMethodError (undefined method 'each' for nil:NilClass):
app/controllers/opening_hours_controller.rb:18:in 'create'
在发生错误的create方法中稍微调试一下后，我发现params [＆＃34; opening_hour＆＃34;]返回nil，这就是为什么它会返回此错误。
任何想法为什么会发生这种情况以及如何使这项工作成功？
更新1
Started POST "/store/opening_hours/create" for 127.0.0.1 at 2018-02-23 13:22:19 +0200
Processing by OpeningHoursController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"rvNr5bq7DmZtpiMPaE6qYMN2dE7+qarFI2c2e8kedYIrSukWQH5/t66QDJijid5QSwT+IhwayORPjY63SS0UTQ==", "opening_hour = "=>[{"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}, {"day"=>"1", "opens"=>"12", "closes"=>"12", "store_id"=>"1"}], "commit"=>"Update Account"}
(0.1ms) BEGIN
Store Load (0.3ms) SELECT "stores".* FROM "stores" WHERE "stores"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]]
OpeningHour Exists (0.6ms) SELECT 1 AS one FROM "opening_hours" WHERE "opening_hours"."opens" = $1 AND "opening_hours"."store_id" = $2 AND "opening_hours"."day" = $3 LIMIT $4 [["opens", "12:00:00"], ["store_id", 1], ["day", 1], ["LIMIT", 1]]
OpeningHour Exists (0.4ms) SELECT 1 AS one FROM "opening_hours" WHERE "opening_hours"."closes" = $1 AND "opening_hours"."store_id" = $2 AND "opening_hours"."day" = $3 LIMIT $4 [["closes", "12:00:00"], ["store_id", 1], ["day", 1], ["LIMIT", 1]]
(0.2ms) ROLLBACK
更新2
Processing by OpeningHoursController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"rvNr5bq7DmZtpiMPaE6qYMN2dE7+qarFI2c2e8kedYIrSukWQH5/t66QDJijid5QSwT+IhwayORPjY63SS0UTQ==", "opening_hour = "=>[{"day"=>"1", "opens"=>"8", "closes"=>"17", "store_id"=>"1"}, {"day"=>"2", "opens"=>"8", "closes"=>"17", "store_id"=>"1"}, {"day"=>"3", "opens"=>"8", "closes"=>"17", "store_id"=>"1"}, {"day"=>"4", "opens"=>"8", "closes"=>"17", "store_id"=>"1"}, {"day"=>"5", "opens"=>"8", "closes"=>"17", "store_id"=>"1"}, {"day"=>"6", "opens"=>"0", "closes"=>"0", "store_id"=>"1"}, {"day"=>"7", "opens"=>"0", "closes"=>"0", "store_id"=>"1"}], "commit"=>"Update Account"}
(0.2ms) BEGIN
Store Load (0.4ms) SELECT "stores".* FROM "stores" WHERE "stores"."id" = $1 LIMIT $2 [["id", 1], ["LIMIT", 1]]
OpeningHour Exists (0.4ms) SELECT 1 AS one FROM "opening_hours" WHERE "opening_hours"."opens" = $1 AND "opening_hours"."store_id" = $2 AND "opening_hours"."day" = $3 LIMIT $4 [["opens", "08:00:00"], ["store_id", 1], ["day", 1], ["LIMIT", 1]]
OpeningHour Exists (0.4ms) SELECT 1 AS one FROM "opening_hours" WHERE "opening_hours"."closes" = $1 AND "opening_hours"."store_id" = $2 AND "opening_hours"."day" = $3 LIMIT $4 [["closes", "17:00:00"], ["store_id", 1], ["day", 1], ["LIMIT", 1]]
SQL (6.5ms) INSERT INTO "opening_hours" ("store_id", "day", "closes", "opens", "created_at", "updated_at") VALUES ($1, $2, $3, $4, $5, $6) RETURNING "id" [["store_id", 1], ["day", 1], ["closes", "17:00:00"], ["opens", "08:00:00"], ["created_at", "2018-02-23 11:30:04.441164"], ["updated_at", "2018-02-23 11:30:04.441164"]]
(0.8ms) COMMIT
更新3
opening_hour.rb
class OpeningHour < ApplicationRecord
belongs_to :store
validates_presence_of :day, :closes, :opens, :store_id
validates_inclusion_of :day, :in => 1..7
validate :opens_before_closes
validate :valid_from_before_valid_through
# sample validation for better user feedback
validates_uniqueness_of :opens, scope: [:store_id, :day]
validates_uniqueness_of :closes, scope: [:store_id, :day]
protected
def opens_before_closes
errors.add(:closes, I18n.t('errors.opens_before_closes')) if opens && closes && opens >= closes
end
def valid_from_before_valid_through
errors.add(:valid_through, I18n.t('errors.valid_from_before_valid_through')) if valid_from && valid_through && valid_from >= valid_through
end
端
答案 0 :(得分：1)
您正在尝试保存相同的记录。您需要在前端添加验证以验证相同的记录。