[FEATURE!] Disable Conjunction for Certain Operators

CHANGELOG.md

@@ -13,6 +13,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Don't generate fields that represent compositions of aspects within mutation types that represent services
 - Moved the `GraphQLAdapter` module to the root directory (`index.js`), simplifying the import process and reducing the required typing.
+- Disabled conjunction on the same field for the following operators:
+  + `eq` (Equal)
+  + `gt` (Greater Than)
+  + `ge` (Greater Than or Equal)
+  + `le` (Less Than or Equal)
+  + `lt` (Less Than)
+  + `startswith`
+  + `endswith`
 
 ### Fixed
 

lib/constants.js

@@ -26,9 +26,22 @@ const STRING_OPERATIONS = {
   contains: 'contains'
 }
 
+const OPERATOR_CONJUNCTION_SUPPORT = {
+  [RELATIONAL_OPERATORS.eq]: false,
+  [RELATIONAL_OPERATORS.ne]: true,
+  [RELATIONAL_OPERATORS.gt]: false,
+  [RELATIONAL_OPERATORS.ge]: false,
+  [RELATIONAL_OPERATORS.le]: false,
+  [RELATIONAL_OPERATORS.lt]: false,
+  [STRING_OPERATIONS.startswith]: false,
+  [STRING_OPERATIONS.endswith]: false,
+  [STRING_OPERATIONS.contains]: true
+}
+
 module.exports = {
   CONNECTION_FIELDS,
   ARGS,
   RELATIONAL_OPERATORS,
-  STRING_OPERATIONS
+  STRING_OPERATIONS,
+  OPERATOR_CONJUNCTION_SUPPORT
 }

lib/resolvers/parse/ast/fromObject.js

@@ -32,13 +32,20 @@ const _arrayToListValue = array => ({
 const _variableToValue = variable => {
   if (Array.isArray(variable)) {
     return _arrayToListValue(variable)
-  } else if (isPlainObject(variable)) {
+  }
+
+  if (isPlainObject(variable)) {
     return _objectToObjectValue(variable)
-  } else if (variable === null) {
+  }
+
+  if (variable === null) {
     return _nullValue
-  } else if (variable === undefined) {
+  }
+
+  if (variable === undefined) {
     return undefined
   }
+
   return _valueToGenericScalarValue(variable)
 }
 

lib/resolvers/parse/ast2cqn/where.js

@@ -24,7 +24,6 @@ const _to_xpr = (ref, gqlOperator, value) => {
   const val = { val: value }
 
   if (STRING_OPERATIONS[gqlOperator]) return [{ func: cdsOperator, args: [ref, val] }]
-
   return [ref, cdsOperator, val]
 }
 

lib/schema/args/filter.js

@@ -10,7 +10,7 @@ const {
 const { gqlName } = require('../../utils')
 const { hasScalarFields, shouldElementBeIgnored } = require('../util')
 const { cdsToGraphQLScalarType } = require('../types/scalar')
-const { RELATIONAL_OPERATORS, STRING_OPERATIONS } = require('../../constants')
+const { RELATIONAL_OPERATORS, STRING_OPERATIONS, OPERATOR_CONJUNCTION_SUPPORT } = require('../../constants')
 const {
   GraphQLBinary,
   GraphQLDate,
@@ -83,10 +83,14 @@ module.exports = cache => {
   const _generateFilterType = (gqlType, operations) => {
     const filterName = gqlType.name + '_filter'
 
-    const cacheFilterType = cache.get(filterName)
-    if (cacheFilterType) return cacheFilterType
+    const cachedFilterType = cache.get(filterName)
+    if (cachedFilterType) return cachedFilterType
 
-    const fields = Object.fromEntries(operations.map(op => [[op], { type: new GraphQLList(gqlType) }]))
+    const ops = operations.map(op => [
+      [op],
+      { type: OPERATOR_CONJUNCTION_SUPPORT[op] ? new GraphQLList(gqlType) : gqlType }
+    ])
+    const fields = Object.fromEntries(ops)
     const newFilterType = new GraphQLInputObjectType({ name: filterName, fields })
     cache.set(filterName, newFilterType)
 

test/schemas/bookshop-graphql.gql

@@ -635,7 +635,7 @@ The `Binary` scalar type represents binary values as `base64url` encoded strings
 scalar Binary
 
 input Binary_filter {
-  eq: [Binary]
+  eq: Binary
   ne: [Binary]
 }
 
@@ -1277,11 +1277,11 @@ The `Date` scalar type represents date values as strings in the ISO 8601 format
 scalar Date
 
 input Date_filter {
-  eq: [Date]
-  ge: [Date]
-  gt: [Date]
-  le: [Date]
-  lt: [Date]
+  eq: Date
+  ge: Date
+  gt: Date
+  le: Date
+  lt: Date
   ne: [Date]
 }
 
@@ -1291,11 +1291,11 @@ The `Decimal` scalar type represents exact signed decimal values. Decimal repres
 scalar Decimal
 
 input Decimal_filter {
-  eq: [Decimal]
-  ge: [Decimal]
-  gt: [Decimal]
-  le: [Decimal]
-  lt: [Decimal]
+  eq: Decimal
+  ge: Decimal
+  gt: Decimal
+  le: Decimal
+  lt: Decimal
   ne: [Decimal]
 }
 
@@ -1305,20 +1305,20 @@ The `Int16` scalar type represents 16-bit non-fractional signed whole numeric va
 scalar Int16
 
 input Int16_filter {
-  eq: [Int16]
-  ge: [Int16]
-  gt: [Int16]
-  le: [Int16]
-  lt: [Int16]
+  eq: Int16
+  ge: Int16
+  gt: Int16
+  le: Int16
+  lt: Int16
   ne: [Int16]
 }
 
 input Int_filter {
-  eq: [Int]
-  ge: [Int]
-  gt: [Int]
-  le: [Int]
-  lt: [Int]
+  eq: Int
+  ge: Int
+  gt: Int
+  le: Int
+  lt: Int
   ne: [Int]
 }
 
@@ -1339,14 +1339,14 @@ enum SortDirection {
 
 input String_filter {
   contains: [String]
-  endswith: [String]
-  eq: [String]
-  ge: [String]
-  gt: [String]
-  le: [String]
-  lt: [String]
+  endswith: String
+  eq: String
+  ge: String
+  gt: String
+  le: String
+  lt: String
   ne: [String]
-  startswith: [String]
+  startswith: String
 }
 
 """
@@ -1355,10 +1355,10 @@ The `Timestamp` scalar type represents timestamp values as strings in the ISO 86
 scalar Timestamp
 
 input Timestamp_filter {
-  eq: [Timestamp]
-  ge: [Timestamp]
-  gt: [Timestamp]
-  le: [Timestamp]
-  lt: [Timestamp]
+  eq: Timestamp
+  ge: Timestamp
+  gt: Timestamp
+  le: Timestamp
+  lt: Timestamp
   ne: [Timestamp]
 }

test/schemas/edge-cases/field-named-localized.gql

@@ -114,11 +114,11 @@ input FieldNamedLocalizedService_localized_orderBy {
 }
 
 input Int_filter {
-  eq: [Int]
-  ge: [Int]
-  gt: [Int]
-  le: [Int]
-  lt: [Int]
+  eq: Int
+  ge: Int
+  gt: Int
+  le: Int
+  lt: Int
   ne: [Int]
 }
 
@@ -137,12 +137,12 @@ enum SortDirection {
 
 input String_filter {
   contains: [String]
-  endswith: [String]
-  eq: [String]
-  ge: [String]
-  gt: [String]
-  le: [String]
-  lt: [String]
+  endswith: String
+  eq: String
+  ge: String
+  gt: String
+  le: String
+  lt: String
   ne: [String]
-  startswith: [String]
+  startswith: String
 }

test/schemas/model-structure/composition-of-aspect.gql

@@ -107,11 +107,11 @@ type CompositionOfAspectService_input {
 }
 
 input ID_filter {
-  eq: [ID]
-  ge: [ID]
-  gt: [ID]
-  le: [ID]
-  lt: [ID]
+  eq: ID
+  ge: ID
+  gt: ID
+  le: ID
+  lt: ID
   ne: [ID]
 }