rename serialize and parseValue methods

integrationTests/ts/kitchenSink-test.ts

@@ -6,8 +6,8 @@ import { Kind } from 'graphql/language';
 // Test subset of public APIs with "exactOptionalPropertyTypes" flag enabled
 new GraphQLScalarType({
   name: 'SomeScalar',
-  serialize: undefined,
-  parseValue: undefined,
+  coerceOutputValue: undefined,
+  coerceInputValue: undefined,
   coerceInputLiteral: undefined,
 });
 

src/execution/__tests__/executor-test.ts

@@ -1258,10 +1258,10 @@ describe('Execute: Handles basic execution tasks', () => {
     expect(asyncResult).to.deep.equal(result);
   });
 
-  it('fails when serialize of custom scalar does not return a value', () => {
+  it('fails when coerceOutputValue of custom scalar does not return a value', () => {
     const customScalar = new GraphQLScalarType({
       name: 'CustomScalar',
-      serialize() {
+      coerceOutputValue() {
         /* returns nothing */
       },
     });
@@ -1283,7 +1283,7 @@ describe('Execute: Handles basic execution tasks', () => {
       errors: [
         {
           message:
-            'Expected `CustomScalar.serialize("CUSTOM_VALUE")` to return non-nullable value, returned: undefined',
+            'Expected `CustomScalar.coerceOutputValue("CUSTOM_VALUE")` to return non-nullable value, returned: undefined',
           locations: [{ line: 1, column: 3 }],
           path: ['customScalar'],
         },

src/execution/__tests__/variables-test.ts

@@ -44,7 +44,7 @@ const TestFaultyScalarGraphQLError = new GraphQLError(
 
 const TestFaultyScalar = new GraphQLScalarType({
   name: 'FaultyScalar',
-  parseValue() {
+  coerceInputValue() {
     throw TestFaultyScalarGraphQLError;
   },
   coerceInputLiteral() {
@@ -54,13 +54,13 @@ const TestFaultyScalar = new GraphQLScalarType({
 
 const TestComplexScalar = new GraphQLScalarType({
   name: 'ComplexScalar',
-  parseValue(value) {
-    expect(value).to.equal('SerializedValue');
-    return 'DeserializedValue';
+  coerceInputValue(value) {
+    expect(value).to.equal('ExternalValue');
+    return 'InternalValue';
   },
   coerceInputLiteral(ast) {
-    expect(ast).to.include({ kind: 'StringValue', value: 'SerializedValue' });
-    return 'DeserializedValue';
+    expect(ast).to.include({ kind: 'StringValue', value: 'ExternalValue' });
+    return 'InternalValue';
   },
 });
 
@@ -284,13 +284,13 @@ describe('Execute: Handles inputs', () => {
       it('properly runs coerceInputLiteral on complex scalar types', () => {
         const result = executeQuery(`
           {
-            fieldWithObjectInput(input: {c: "foo", d: "SerializedValue"})
+            fieldWithObjectInput(input: {c: "foo", d: "ExternalValue"})
           }
         `);
 
         expect(result).to.deep.equal({
           data: {
-            fieldWithObjectInput: '{ c: "foo", d: "DeserializedValue" }',
+            fieldWithObjectInput: '{ c: "foo", d: "InternalValue" }',
           },
         });
       });
@@ -447,25 +447,25 @@ describe('Execute: Handles inputs', () => {
       });
 
       it('executes with complex scalar input', () => {
-        const params = { input: { c: 'foo', d: 'SerializedValue' } };
+        const params = { input: { c: 'foo', d: 'ExternalValue' } };
         const result = executeQuery(doc, params);
 
         expect(result).to.deep.equal({
           data: {
-            fieldWithObjectInput: '{ c: "foo", d: "DeserializedValue" }',
+            fieldWithObjectInput: '{ c: "foo", d: "InternalValue" }',
           },
         });
       });
 
       it('errors on faulty scalar type input', () => {
-        const params = { input: { c: 'foo', e: 'SerializedValue' } };
+        const params = { input: { c: 'foo', e: 'ExternalValue' } };
         const result = executeQuery(doc, params);
 
         expectJSON(result).toDeepEqual({
           errors: [
             {
               message:
-                'Variable "$input" got invalid value "SerializedValue" at "input.e"; FaultyScalarErrorMessage',
+                'Variable "$input" got invalid value "ExternalValue" at "input.e"; FaultyScalarErrorMessage',
               locations: [{ line: 2, column: 16 }],
               extensions: { code: 'FaultyScalarErrorExtensionCode' },
             },

src/execution/execute.ts

@@ -763,7 +763,7 @@ function toNodes(fieldDetailsList: FieldDetailsList): ReadonlyArray<FieldNode> {
  * Implements the "Executing fields" section of the spec
  * In particular, this function figures out the value that the field returns by
  * calling its resolve function, then calls completeValue to complete promises,
- * serialize scalars, or execute the sub-selection-set for objects.
+ * coercing scalars, or execute the sub-selection-set for objects.
  */
 function executeField(
   exeContext: ExecutionContext,
@@ -937,7 +937,7 @@ function handleFieldError(
  * for the inner type on each item in the list.
  *
  * If the field type is a Scalar or Enum, ensures the completed value is a legal
- * value of the type by calling the `serialize` method of GraphQL type
+ * value of the type by calling the `coerceOutputValue` method of GraphQL type
  * definition.
  *
  * If the field is an abstract type, determine the runtime type of the value
@@ -1001,8 +1001,8 @@ function completeValue(
     );
   }
 
-  // If field type is a leaf type, Scalar or Enum, serialize to a valid value,
-  // returning null if serialization is not possible.
+  // If field type is a leaf type, Scalar or Enum, coerce to a valid value,
+  // returning null if coercion is not possible.
   if (isLeafType(returnType)) {
     return [completeLeafValue(returnType, result), undefined];
   }
@@ -1571,14 +1571,14 @@ function completeLeafValue(
   returnType: GraphQLLeafType,
   result: unknown,
 ): unknown {
-  const serializedResult = returnType.serialize(result);
-  if (serializedResult == null) {
+  const coerced = returnType.coerceOutputValue(result);
+  if (coerced == null) {
     throw new Error(
-      `Expected \`${inspect(returnType)}.serialize(${inspect(result)})\` to ` +
-        `return non-nullable value, returned: ${inspect(serializedResult)}`,
+      `Expected \`${inspect(returnType)}.coerceOutputValue(${inspect(result)})\` to ` +
+        `return non-nullable value, returned: ${inspect(coerced)}`,
     );
   }
-  return serializedResult;
+  return coerced;
 }
 
 /**

src/index.ts

@@ -198,8 +198,9 @@ export type {
   GraphQLUnionTypeExtensions,
   GraphQLScalarSerializer,
   GraphQLScalarValueParser,
-  /* @deprecated in favor of GraphQLScalarInputLiteralCoercer, will be removed in v18 */
   GraphQLScalarLiteralParser,
+  GraphQLScalarOutputValueCoercer,
+  GraphQLScalarInputValueCoercer,
   GraphQLScalarInputLiteralCoercer,
   GraphQLDefaultValueUsage,
 } from './type/index.js';

src/type/__tests__/definition-test.ts

@@ -60,6 +60,8 @@ describe('Type System: Scalars', () => {
       serialize: someScalar.serialize,
       parseValue: someScalar.parseValue,
       parseLiteral: someScalar.parseLiteral,
+      coerceOutputValue: someScalar.coerceOutputValue,
+      coerceInputValue: someScalar.coerceInputValue,
       coerceInputLiteral: undefined,
       valueToLiteral: undefined,
       extensions: {},
@@ -76,6 +78,8 @@ describe('Type System: Scalars', () => {
       serialize: passThroughFunc,
       parseValue: passThroughFunc,
       parseLiteral: passThroughFunc,
+      coerceOutputValue: passThroughFunc,
+      coerceInputValue: passThroughFunc,
       coerceInputLiteral: passThroughFunc,
       valueToLiteral: passThroughFunc,
       extensions: { someExtension: 'extension' },
@@ -95,6 +99,8 @@ describe('Type System: Scalars', () => {
       serialize: passThroughFunc,
       parseValue: passThroughFunc,
       parseLiteral: passThroughFunc,
+      coerceOutputValue: passThroughFunc,
+      coerceInputValue: passThroughFunc,
       coerceInputLiteral: passThroughFunc,
       valueToLiteral: passThroughFunc,
       extensions: { [test]: 'extension' },
@@ -110,6 +116,8 @@ describe('Type System: Scalars', () => {
 
     expect(scalar.serialize).to.equal(identityFunc);
     expect(scalar.parseValue).to.equal(identityFunc);
+    expect(scalar.coerceOutputValue).to.equal(identityFunc);
+    expect(scalar.coerceInputValue).to.equal(identityFunc);
     expect(scalar.parseLiteral).to.be.a('function');
     /* default will be provided in v18 when parseLiteral is removed */
     // expect(scalar.coerceInputLiteral).to.be.a('function');
@@ -143,15 +151,15 @@ describe('Type System: Scalars', () => {
     );
   });
 
-  it('rejects a Scalar type defining coerceInputLiteral but not parseValue', () => {
+  it('rejects a Scalar type defining coerceInputLiteral but not coerceInputValue', () => {
     expect(
       () =>
         new GraphQLScalarType({
           name: 'SomeScalar',
           coerceInputLiteral: passThroughFunc,
         }),
     ).to.throw(
-      'SomeScalar must provide both "parseValue" and "coerceInputLiteral" functions.',
+      'SomeScalar must provide both "coerceInputValue" and "coerceInputLiteral" functions.',
     );
   });
 });
@@ -644,6 +652,30 @@ describe('Type System: Enums', () => {
     expect(someEnum.toConfig()).to.deep.equal(someEnumConfig);
   });
 
+  it('can be coerced to an output value via serialize() method', () => {
+    const someEnum = new GraphQLEnumType({
+      name: 'SomeEnum',
+      values: {
+        FOO: {
+          value: 'foo',
+        },
+      },
+    });
+    expect(someEnum.serialize('foo')).to.equal('FOO');
+  });
+
+  it('can be coerced to an input value via parseValue() method', () => {
+    const someEnum = new GraphQLEnumType({
+      name: 'SomeEnum',
+      values: {
+        FOO: {
+          value: 'foo',
+        },
+      },
+    });
+    expect(someEnum.parseValue('FOO')).to.equal('foo');
+  });
+
   it('defines an enum type with deprecated value', () => {
     const EnumTypeWithDeprecatedValue = new GraphQLEnumType({
       name: 'EnumWithDeprecatedValue',