为什么某些模型属性没有保存在db中？
我的rails应用程序中有一个引用模型，它有各种attr类型，其中一些是由db发送/保存的，有些不是，我无法理解为什么。 请你帮我理解，谢谢。
quotes_controller.rb
class QuotesController < ApplicationController def create @quote = Quote.new(quote_params) if @quote.save redirect_to root_url, notice: 'Quote request created' else render :new end end private def quote_params params.require(:quote).permit(:gla, :prev_cover, :co_name, :postcode, :industry, :lives_overseas, :scheme_start_date, :payment_frequency, :commision_level) end end quote.rb模型
class Quote < ApplicationRecord validates :gla, presence: { message: "Must be selected" } enum industry: [ :financial_services, :architect, :business_consultancy ] enum payment_frequency: [ :annually, :monthly ] end schema.rb create_table "quotes", force: :cascade do |t| t.boolean "prev_cover" t.string "co_name" t.integer "co_number" t.string "postcode" t.string "industry" t.boolean "lives_overseas" t.date "scheme_start_date" t.string "payment_frequency" t.integer "commission_level" t.datetime "created_at", null: false t.datetime "updated_at", null: false t.boolean "gla" end
rails console：
Pry> Quote.last.attributes Quote Load (0.4ms) SELECT "quotes".* FROM "quotes" ORDER BY "quotes"."id" DESC LIMIT $1 [["LIMIT", 1]] => {"id"=>6, "prev_cover"=>true, "co_name"=>"test1", "co_number"=>nil, "postcode"=>"al1 1aa", "industry"=>nil, "lives_overseas"=>true, "scheme_start_date"=>Wed, 31 May 2017, "payment_frequency"=>nil, "commission_level"=>nil, "created_at"=>Wed, 31 May 2017 19:23:07 UTC +00:00, "updated_at"=>Wed, 31 May 2017 19:23:07 UTC +00:00, "gla"=>true}
堆栈跟踪：
Started POST "/quotes" for 127.0.0.1 at 2017-05-31 21:04:37 +0100 Processing by QuotesController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"ILAo0Bs9Wq9lrVPlM2e6+a1kioV9zbni9Uxd5Yt/QSLNY3aVWyJ4TsEUmXN62RWgbueHksr/yN6avwEm8v7bEQ==", "quote"=>{"gla"=>"1", "prev_cover"=>"true", "co_name"=>"testing1", "co_number"=>"123456", "postcode"=>"al1 1aa", "industry"=>"", "lives_overseas"=>"true", "scheme_start_date(1i)"=>"2017", "scheme_start_date(2i)"=>"5", "scheme_start_date(3i)"=>"31", "payment_frequency"=>"", "commission_level"=>"10"}, "commit"=>"Get quote"} Unpermitted parameters: co_number, commission_level (0.1ms) BEGIN SQL (0.2ms) INSERT INTO "quotes" ("prev_cover", "co_name", "postcode", "lives_overseas", "scheme_start_date", "created_at", "updated_at", "gla") VALUES ($1, $2, $3, $4, $5, $6, $7, $8) RETURNING "id" [["prev_cover", "t"], ["co_name", "testing1"], ["postcode", "al1 1aa"], ["lives_overseas", "t"], ["scheme_start_date", "2017-05-31"], ["created_at", "2017-05-31 20:04:37.489368"], ["updated_at", "2017-05-31 20:04:37.489368"], ["gla", "t"]] (0.3ms) COMMIT Redirected to http://localhost:3000/ Completed 302 Found in 3ms (ActiveRecord: 0.6ms) Started GET "/" for 127.0.0.1 at 2017-05-31 21:04:37 +0100 Processing by QuotesController#new as HTML Rendering quotes/new.html.erb within layouts/application Rendered quotes/new.html.erb within layouts/application (9.3ms) Completed 200 OK in 34ms (Views: 32.7ms | ActiveRecord: 0.0ms)
从Rails控制台。
[1] pry(main)> Quote.last Quote Load (0.2ms) SELECT "quotes".* FROM "quotes" ORDER BY "quotes"."id" DESC LIMIT $1 [["LIMIT", 1]] => #
好的堆栈跟踪和@toddmetheny帮助我理清丢失或错误的允许的attrs。 现在只是枚举Quote.industries和Quote.payment_frequencies其值未被保存。
好的，所以代码改为;
这会从表单中发送attrs，但它们仍然不会在db，stack trace中创建：
Started POST "/quotes" for 127.0.0.1 at 2017-05-31 21:39:58 +0100 Processing by QuotesController#create as HTML Parameters: {"utf8"=>"✓", "authenticity_token"=>"rkgX7CwrEHS/KnqG1C77mYkCiCEOWGshTxMCsbtGPdjGiDP20J4ccrAgplAGuKrdJyhECRWrsmXI0Ee9GNa6Zw==", "quote"=>{"gla"=>"1", "prev_cover"=>"true", "co_name"=>"halejulia", "co_number"=>"134532", "postcode"=>"al1 1aa", "industry"=>"financial_services", "lives_overseas"=>"true", "scheme_start_date(1i)"=>"2017", "scheme_start_date(2i)"=>"5", "scheme_start_date(3i)"=>"31", "payment_frequency"=>"monthly", "commission_level"=>"10"}, "commit"=>"Get quote"} (0.1ms) BEGIN SQL (0.3ms) INSERT INTO "quotes" ("prev_cover", "co_name", "co_number", "postcode", "industry", "lives_overseas", "scheme_start_date", "payment_frequency", "commission_level", "created_at", "updated_at", "gla") VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12) RETURNING "id" [["prev_cover", "t"], ["co_name", "halejulia"], ["co_number", 134532], ["postcode", "al1 1aa"], ["industry", 0], ["lives_overseas", "t"], ["scheme_start_date", "2017-05-31"], ["payment_frequency", 1], ["commission_level", 10], ["created_at", "2017-05-31 20:39:58.957674"], ["updated_at", "2017-05-31 20:39:58.957674"], ["gla", "t"]] (0.3ms) COMMIT Redirected to http://localhost:3000/ Completed 302 Found in 3ms (ActiveRecord: 0.7ms)
rails console：
Quote.last.payment_frequency Quote Load (0.4ms) SELECT "quotes".* FROM "quotes" ORDER BY "quotes"."id" DESC LIMIT $1 [["LIMIT", 1]] => nil
所以仍然没有在数据库中保留params，他们被允许参数！ 有任何想法吗？
奇怪的是， psql select * from ..查询显示值已经保存，但是Rails控制台; Quote.last.payment_frequency返回nil ???
啊哈，我看到对于枚举，列类型应该是整数，但它在我的模型中是字符串，这可能是问题吗？
enum’d attrs的数据类型更改为整数，并且所有数据类型都按预期运行。
发布堆栈跟踪。 co_number不在允许的参数中列入白名单。 这至少是该特定领域问题的一部分。 其他的是…但是在日志中发布您实际看到的内容，以便我们可以看到通过表单传递的内容。 堆栈跟踪中还会有消息，为您提供有关这些值未保存的原因的线索。
更新：堆栈跟踪列出了2个未允许的参数： co_number和commission_level （您有一个错误允许佣金级别，而co_number不存在）
有几件事情也有空白价值……就像payment_frequency和industry ……我会深入研究为什么这些东西如果不应该是空白的话。 表格是否具有这些东西的价值？ 他们没有被通过。 这似乎占了你剩下的零值。