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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,59 @@ | ||
| --- | ||
| title: Open string enums | ||
| --- | ||
|
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| Some people like to use tables and foreign keys to encode enums. It'll typically take this form: | ||
|
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| ```sql | ||
| create table title (code text primary key); | ||
| insert into title (code) values ('mr'), ('ms'), ('dr'), ('phd'); | ||
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| create table titledperson | ||
| ( | ||
| title text not null references title, | ||
| name text not null | ||
| ); | ||
|
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| ``` | ||
|
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| You can configure typo to generate so-called "open enums" for you. | ||
|
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| ```scala | ||
| val options = Options( | ||
| // ... | ||
| openEnums = Selector.relationNames("title") | ||
| ) | ||
| ``` | ||
|
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|
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| And typo will output the [Primary key type](./id-types.md) as something like this: | ||
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| ```scala | ||
| /** Type for the primary key of table `public.title`. It has some known values: | ||
| * - dr | ||
| * - mr | ||
| * - ms | ||
| * - phd | ||
| */ | ||
| sealed abstract class TitleId(val value: String) | ||
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| object TitleId { | ||
| def apply(underlying: String): TitleId = | ||
| ByName.getOrElse(underlying, Unknown(underlying)) | ||
| case object dr extends TitleId("dr") | ||
| case object mr extends TitleId("mr") | ||
| case object ms extends TitleId("ms") | ||
| case object phd extends TitleId("phd") | ||
| case class Unknown(override val value: String) extends TitleId(value) | ||
| val All: List[TitleId] = List(dr, mr, ms, phd) | ||
| val ByName: Map[String, TitleId] = All.map(x => (x.value, x)).toMap | ||
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| // type class instances | ||
| } | ||
| ``` | ||
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| ## Supported data types | ||
|
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| Currently, typo supports the following data types for open enums: | ||
| - `text` | ||
| - a domain which has `text` as its base type |
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37 changes: 37 additions & 0 deletions
37
typo-tester-anorm/generated-and-checked-in/adventureworks/public/title/TitleFields.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,37 @@ | ||
| /** | ||
| * File has been automatically generated by `typo`. | ||
| * | ||
| * IF YOU CHANGE THIS FILE YOUR CHANGES WILL BE OVERWRITTEN. | ||
| */ | ||
| package adventureworks | ||
| package public | ||
| package title | ||
|
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| import typo.dsl.Path | ||
| import typo.dsl.SqlExpr.FieldLikeNoHkt | ||
| import typo.dsl.SqlExpr.IdField | ||
| import typo.dsl.Structure.Relation | ||
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| trait TitleFields { | ||
| def code: IdField[TitleId, TitleRow] | ||
| } | ||
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| object TitleFields { | ||
| lazy val structure: Relation[TitleFields, TitleRow] = | ||
| new Impl(Nil) | ||
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| private final class Impl(val _path: List[Path]) | ||
| extends Relation[TitleFields, TitleRow] { | ||
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| override lazy val fields: TitleFields = new TitleFields { | ||
| override def code = IdField[TitleId, TitleRow](_path, "code", None, None, x => x.code, (row, value) => row.copy(code = value)) | ||
| } | ||
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| override lazy val columns: List[FieldLikeNoHkt[?, TitleRow]] = | ||
| List[FieldLikeNoHkt[?, TitleRow]](fields.code) | ||
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| override def copy(path: List[Path]): Impl = | ||
| new Impl(path) | ||
| } | ||
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| } |
52 changes: 52 additions & 0 deletions
52
typo-tester-anorm/generated-and-checked-in/adventureworks/public/title/TitleId.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| /** | ||
| * File has been automatically generated by `typo`. | ||
| * | ||
| * IF YOU CHANGE THIS FILE YOUR CHANGES WILL BE OVERWRITTEN. | ||
| */ | ||
| package adventureworks | ||
| package public | ||
| package title | ||
|
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| import anorm.Column | ||
| import anorm.ParameterMetaData | ||
| import anorm.ToStatement | ||
| import java.sql.Types | ||
| import play.api.libs.json.JsValue | ||
| import play.api.libs.json.Reads | ||
| import play.api.libs.json.Writes | ||
|
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| /** Type for the primary key of table `public.title`. It has some known values: | ||
| * - dr | ||
| * - mr | ||
| * - ms | ||
| * - phd | ||
| */ | ||
| sealed abstract class TitleId(val value: String) | ||
|
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| object TitleId { | ||
| def apply(underlying: String): TitleId = | ||
| ByName.getOrElse(underlying, Unknown(underlying)) | ||
| case object dr extends TitleId("dr") | ||
| case object mr extends TitleId("mr") | ||
| case object ms extends TitleId("ms") | ||
| case object phd extends TitleId("phd") | ||
| case class Unknown(override val value: String) extends TitleId(value) | ||
| val All: List[TitleId] = List(dr, mr, ms, phd) | ||
| val ByName: Map[String, TitleId] = All.map(x => (x.value, x)).toMap | ||
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| implicit lazy val arrayColumn: Column[Array[TitleId]] = Column.columnToArray[String](Column.columnToString, implicitly).map(_.map(TitleId.apply)) | ||
| implicit lazy val arrayToStatement: ToStatement[Array[TitleId]] = ToStatement.arrayToParameter(ParameterMetaData.StringParameterMetaData).contramap(_.map(_.value)) | ||
| implicit lazy val column: Column[TitleId] = Column.columnToString.map(TitleId.apply) | ||
| implicit lazy val ordering: Ordering[TitleId] = Ordering.by(_.value) | ||
| implicit lazy val parameterMetadata: ParameterMetaData[TitleId] = new ParameterMetaData[TitleId] { | ||
| override def sqlType: String = "text" | ||
| override def jdbcType: Int = Types.OTHER | ||
| } | ||
| implicit lazy val reads: Reads[TitleId] = Reads[TitleId]{(value: JsValue) => value.validate(Reads.StringReads).map(TitleId.apply)} | ||
| implicit lazy val text: Text[TitleId] = new Text[TitleId] { | ||
| override def unsafeEncode(v: TitleId, sb: StringBuilder) = Text.stringInstance.unsafeEncode(v.value, sb) | ||
| override def unsafeArrayEncode(v: TitleId, sb: StringBuilder) = Text.stringInstance.unsafeArrayEncode(v.value, sb) | ||
| } | ||
| implicit lazy val toStatement: ToStatement[TitleId] = ToStatement.stringToStatement.contramap(_.value) | ||
| implicit lazy val writes: Writes[TitleId] = Writes[TitleId](value => Writes.StringWrites.writes(value.value)) | ||
| } |
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