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Mike Slinn
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I can nicely select records. This nice syntax is possible because Doobie iterates through the Course case class properties and assigns values to them by matching their names to the courses database record fields:

However insert requires all of the case class properties to be manually listed out, and matched up with values, which is horrible and error-prone:

I can nicely select records:

However insert requires all of the case class properties to be listed out, and matched up with values, which is horrible:

I can nicely select records. This nice syntax is possible because Doobie iterates through the Course case class properties and assigns values to them by matching their names to the courses database record fields:

However insert requires all of the case class properties to be manually listed, and matched up with values, which is horrible and error-prone:

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Mike Slinn
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  • 89

Doobie update and insert case class syntax

Doobie can select * with a case class for convenient and correct parameter passing, but I don't see how to work in a similar way with update and insert.

For example, given a case class like this:

case class Course(
  sku: String,
  title: String,
  id: Id,
  price: Int,
  instructorid: Id,
  groupid: Id,
  shortdescription: String = "",
  transcript: String = "",
  project_home: String = "",
  repository: String = "",
  category: String = "",
  image: String = "",
  privacy: String = "",
  language: String = "",
  keywords: String = "",
  goals: String = "",
  instructionallevel: String = "",
  audience: String = "",
  studenttasks: String =  "",
  sections: String = "",
  active: Boolean = true,
  video: String = "",
  paypal_button_id: String = "",
  prerequisite_ids: String = ""
)

I can nicely select records:

    def find(id: Id): Option[Course] =
      sql"select * from courses where id = $id"
        .query[Course]
        .option
        .transact(SQLSupport.xa)
        .unsafeRunSync

However insert requires all of the case class properties to be listed out, and matched up with values, which is horrible:

    /** @return saved Course with new Id */
    def save(course: Course): Course = {
      val insert: doobie.ConnectionIO[Course] = sql"""insert into courses (
          sku,
          title,
          price,
          instructorid,
          groupid,
          shortdescription,
          transcript,
          project_home,
          repository,
          category,
          image,
          privacy,
          language,
          keywords,
          goals,
          instructionallevel,
          audience,
          studenttasks,
          sections,
          active,
          video,
          paypal_button_id,
          prerequisite_ids
        ) values (
          ${ course.sku },
          ${ course.title },
          ${ course.price },
          ${ course.instructorid },
          ${ course.groupid },
          ${ course.shortdescription },
          ${ course.transcript },
          ${ course.project_home },
          ${ course.repository },
          ${ course.category },
          ${ course.image },
          ${ course.privacy },
          ${ course.language },
          ${ course.keywords },
          ${ course.goals },
          ${ course.instructionallevel },
          ${ course.audience },
          ${ course.studenttasks },
          ${ course.sections },
          ${ course.active },
          ${ course.video },
          ${ course.paypal_button_id },
          ${ course.prerequisite_ids }
        )"""
        .update
        .withUniqueGeneratedKeys("id")
      val newCourse: Course = insert.transact(SQLSupport.xa).unsafeRunSync
      newCourse
    }

Also update is similarly horrible:

    /** @return updated Course, which should be identical to the given course */
    def update(course: Course): Course = {
      val update: doobie.ConnectionIO[Course] = sql"""update courses set
          sku = ${ course.sku },
          title = ${ course.title },
          id = ${ course.id },
          price = ${ course.price },
          instructorid = ${ course.instructorid },
          groupid = ${ course.groupid },
          shortdescription = ${ course.shortdescription },
          transcript = ${ course.transcript },
          project_home = ${ course.project_home },
          repository = ${ course.repository },
          category = ${ course.category },
          image = ${ course.image },
          privacy = ${ course.privacy },
          language = ${ course.language },
          keywords = ${ course.keywords },
          goals = ${ course.goals },
          instructionallevel = ${ course.instructionallevel },
          audience = ${ course.audience },
          studenttasks = ${ course.studenttasks },
          sections = ${ course.sections },
          active = ${ course.active },
          video = ${ course.video },
          paypal_button_id = ${ course.paypal_button_id },
          prerequisite_ids = ${ course.prerequisite_ids }
        where id = ${ course.id }"""
        .update
        .withUniqueGeneratedKeys("id")
      val modifiedCourse: Course = update.transact(SQLSupport.xa).unsafeRunSync
      modifiedCourse
    }

Is there a better way?