检查一个字段是否包含在 ROR 的另一个列表中

Question

我有一个名为 @domianskill_technical_skills 的列表。此 table 与 domain_skills 和 technical_skills 数据相关 table 并基于检索在 domain_skill_id

我需要 return technical_skills table 中的所有 technical_skills，但还有一个属性名为 assigned 如果 technical_skill_id 出现在 @domianskill_technical_skills 列表中，则为真。

我的工作代码如下

def assigned_technical_skills

      @domain_skill_technical_skills = DomainSkillsTechnicalSkill.select('id, technical_skill_id').where(domain_skill_id: params[:domain_skill_id])

      Rails.logger.info(@domain_skill_technical_skills.to_a)

      TechnicalSkill.all.where(record_status: 1).each do |skill|

        if @domain_skill_technical_skills.include?(skill.id) then
          Rails.logger.info(skill.id.to_s + skill.name)
        end

      end

      respond_with @domain_skill_technical_skills
  end

请指导我更正 if 语句，还需要 select 所需的字段（id、名称、分配）并为 return 创建一个实例。

Answer 1

如果 DomainSkillsTechnicalSkill 有 'technical_skill_id' 列

，您可能想用这个替换您的代码

def assigned_technical_skills
  # just collect technical_skill_id 
  @domain_skill_technical_skill_ids = DomainSkillsTechnicalSkill.select('id, technical_skill_id').where(domain_skill_id: params[:domain_skill_id]).collect(&:technical_skill_id)
  Rails.logger.info(@domain_skill_technical_skill_ids.to_a)
  @technical_skills = []  
  TechnicalSkill.select('id, name').where(record_status: 1).each do |skill|

    @technical_skills << skill.as_json.merge!(
      { assigned: @domain_skill_technical_skill_ids.include?(skill.id)}
    )       
  end
  respond_with @technical_skills
end

检查一个字段是否包含在 ROR 的另一个列表中

Check a field is contains in another list in ROR

ruby

contains

ruby-on-rails-4