Renaming of enum values

docs/types.md

@@ -96,3 +96,15 @@
 - `type_name` _[string]_ - name of the type
 - `attribute_name` _[string]_ - name of the attribute to rename
 - `new_attribute_name` _[string]_ - new name of the attribute
+
+---
+
+### `pgm.renameTypeValue( type_name, value, new_value )`
+
+> Rename a value of enum data type - [postgres docs](https://www.postgresql.org/docs/current/static/sql-altertype.html)
+
+**Arguments:**
+
+- `type_name` _[string]_ - name of the type
+- `value` _[string]_ - value to rename
+- `new_value` _[string]_ - new value

index.d.ts

@@ -3,6 +3,7 @@
 // Definitions by: Bradley Ayers <https://github.com/bradleyayers>
 // Definitions by: Sam Grönblom <https://github.com/sgronblo>
 // Definitions by: Jan Doležel <https://github.com/dolezel>
+// Definitions by: Christopher Quadflieg <https://github.com/Shinigami92>
 
 interface ValueArray extends Array<Value> {}
 
@@ -391,6 +392,7 @@ export interface MigrationBuilder {
     setTypeAttribute(typeName: Name, attributeName: string, attributeType: Type): void
     addTypeValue(typeName: Name, value: Value, options?: { ifNotExists?: boolean, before?: string, after?: string }): void
     renameTypeAttribute(typeName: Name, attributeName: string, newAttributeName: string): void
+    renameTypeValue(typeName: Name, value: string, newValue: string): void
 
     // Roles
     createRole(roleName: Name, roleOptions?: RoleOptions): void

lib/migration-builder.js

@@ -78,6 +78,7 @@ module.exports = class MigrationBuilder {
     this.addType = this.createType;
     this.renameType = wrap(types.renameType);
     this.renameTypeAttribute = wrap(types.renameTypeAttribute);
+    this.renameTypeValue = wrap(types.renameTypeValue);
     this.addTypeAttribute = wrap(types.addTypeAttribute(typeShorthands));
     this.dropTypeAttribute = wrap(types.dropTypeAttribute);
     this.setTypeAttribute = wrap(types.setTypeAttribute(typeShorthands));

lib/operations/types.js

@@ -73,8 +73,18 @@ function renameTypeAttribute(typeName, attributeName, newAttributeName) {
 const undoRenameTypeAttribute = (typeName, attributeName, newAttributeName) =>
   renameTypeAttribute(typeName, newAttributeName, attributeName);
 
+function renameTypeValue(typeName, value, newValue) {
+  const valueStr = escapeValue(value);
+  const newValueStr = escapeValue(newValue);
+  return template`ALTER TYPE "${typeName}" RENAME VALUE ${valueStr} TO ${newValueStr};`;
+}
+
+const undoRenameTypeValue = (typeName, value, newValue) =>
+  renameTypeValue(typeName, newValue, value);
+
 renameType.reverse = undoRename;
 renameTypeAttribute.reverse = undoRenameTypeAttribute;
+renameTypeValue.reverse = undoRenameTypeValue;
 
 module.exports = {
   createType,
@@ -84,5 +94,6 @@ module.exports = {
   dropTypeAttribute,
   setTypeAttribute,
   renameTypeAttribute,
+  renameTypeValue,
   addTypeValue
 };

package.json

@@ -4,7 +4,8 @@
   "description": "Postgresql database migration management tool for node.js",
   "author": "Theo Ephraim",
   "contributors": [
-    "Jan Doležel <[email protected]> (http://www.eithel.net/)"
+    "Jan Doležel <[email protected]> (http://www.eithel.net/)",
+    "Christopher Quadflieg <[email protected]>"
   ],
   "bin": {
     "node-pg-migrate": "bin/node-pg-migrate"

test/migrations/074_rename_type_value.js

@@ -0,0 +1,4 @@
+exports.up = pgm => {
+  pgm.createType("list2", ["a", "d", "c"]);
+  pgm.renameTypeValue("list2", "d", "b");
+};