code: function checkSelectOnlyIds () {
      // default to false
      this.isSelectOnlyIds = false
      // false if doing select by id
      if (this.isSelectById) {
          return
      }
      // false if selecting all and not using cache
      if (this.args.all && (!this.model.cache || this.args.cache === false)) {
          return
      }
      // false if selecting a single record
      if (this.args.limit === 1) {
          return
      }
      // false if selecting custom columns
      if (defined(this.args.select)) {
          return
      }
      // false if fetching isCurrent
      if (this.args.isCurrent) {
          return
      }
      // set to true if all negative tests passed
      this.isSelectOnlyIds = true
  }
docs: @function checkSelectOnlyIds
  
  set isSelectOnlyIds flag