为什么我对 jsonb 的 rails 范围查询不起作用？

Question

我有一个带有默认 {} 的 jsonb 列，添加了密钥 "home_page":"1"（更新属性并保存...）。

我为模型添加了一个范围 -

scope :home_page, -> { where("my_column ->> 'home_page' = ?", "1") }

无论我做什么，我总是得到一个空的结果。

帮助:(

导轨 - 5.2.2， 红宝石 - 2.5， 数据库 - PostgreSQL 10.3

Answer 1

您的示波器正在工作。

class Thing < ApplicationRecord
  scope :home_page, -> { where("my_column ->> 'home_page' = ?", "1") }
end

如此通过规范所示：

require 'rails_helper'

RSpec.describe Thing, type: :model do
  after(:each) { Thing.destroy_all }
  describe '.home_page' do
    it "includes records with home_page: 1" do
      thing = Thing.create(my_column: { home_page: 1 })
      expect(Thing.home_page).to include thing
    end

    it "includes records with home_page: '1'" do
      thing = Thing.create(my_column: { home_page: '1' })
      expect(Thing.home_page).to include thing
    end

    it "does not return records that do not match the criteria" do
      Thing.create(my_column: { home_page: 0 })
      Thing.create(my_column: { xhome_page: 1 })
      expect(Thing.home_page).to be_empty
    end
  end
end

错误在于您的测试方法或设置。例如，您可以尝试拨打.save! 来查看是否有任何验证错误。