Add fallback for unknown types in KSP

querydsl-examples/querydsl-example-ksp-codegen/build.gradle.kts

@@ -22,6 +22,7 @@ dependencies {
         implementation("io.github.openfeign.querydsl:querydsl-core:${querydslVersion}")
         implementation("org.hibernate.orm:hibernate-core:${hibernateVersion}")
         ksp("io.github.openfeign.querydsl:querydsl-ksp-codegen:${querydslVersion}")
+        implementation("org.locationtech.jts:jts-core:1.19.0")
         implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.19.0")
         testImplementation("io.github.openfeign.querydsl:querydsl-jpa:${querydslVersion}")
         testImplementation("org.assertj:assertj-core:${assertjVersion}")

querydsl-examples/querydsl-example-ksp-codegen/src/main/kotlin/com/querydsl/example/ksp/Geolocation.kt

@@ -0,0 +1,14 @@
+package com.querydsl.example.ksp
+
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+import jakarta.persistence.Id
+import org.locationtech.jts.geom.Point
+
+@Entity
+class Geolocation(
+	@Id
+	val id: Int,
+	@Column(columnDefinition = "geography(Point, 4326)")
+	var location: Point? = null,
+)

querydsl-examples/querydsl-example-ksp-codegen/src/test/kotlin/Tests.kt

@@ -7,6 +7,7 @@ import com.querydsl.example.ksp.QBear
 import com.querydsl.example.ksp.QBearSimplifiedProjection
 import com.querydsl.example.ksp.QCat
 import com.querydsl.example.ksp.QDog
+import com.querydsl.example.ksp.QGeolocation
 import com.querydsl.example.ksp.QPerson
 import com.querydsl.example.ksp.QPersonClassDTO
 import com.querydsl.example.ksp.QPersonClassConstructorDTO
@@ -248,6 +249,16 @@ class Tests {
         }
     }
 
+    @Test
+    fun `is detecting comparable interface on unknown type`() {
+        val locationTypeName = QGeolocation::class
+            .members
+            .first { it.name == "location" }
+            .returnType
+            .toString()
+        assertThat(locationTypeName).isEqualTo("com.querydsl.core.types.dsl.ComparablePath<org.locationtech.jts.geom.Point>")
+    }
+
     private fun initialize(): EntityManagerFactory {
         val configuration = Configuration()
             .setProperty(AvailableSettings.JAKARTA_JDBC_DRIVER, org.h2.Driver::class.qualifiedName!!)

querydsl-tooling/querydsl-ksp-codegen/src/main/kotlin/com/querydsl/ksp/codegen/TypeExtractor.kt

@@ -24,7 +24,7 @@ class TypeExtractor(
                 ?: simpleType(type)
                 ?: referenceType(type)
                 ?: collectionType(type)
-                ?: throwError("Type was not recognised, This may be an entity that has not been annotated with @Entity, or maybe you are using javax instead of jakarta.")
+                ?: fallbackType(type)
         }
     }
 
@@ -45,6 +45,27 @@ class TypeExtractor(
         }
     }
 
+    private fun fallbackType(type: KSType): QPropertyType.Simple {
+        val declaration = type.declaration
+        val isComparable = if (declaration is KSClassDeclaration) {
+            val comparableNames = listOfNotNull(
+                Comparable::class.java.canonicalName,
+                java.lang.Comparable::class.qualifiedName
+            )
+            declaration.getAllSuperTypes().any {
+                comparableNames.contains(it.toClassName().canonicalName)
+            }
+        } else {
+            false
+        }
+        val className = type.toClassNameSimple()
+        if (isComparable) {
+            return QPropertyType.Simple(SimpleType.Comparable(className))
+        } else {
+            return QPropertyType.Simple(SimpleType.Simple(className))
+        }
+    }
+
     private fun simpleType(type: KSType): QPropertyType.Simple? {
         val className = type.toClassNameSimple()
         val simpleType = SimpleType.Mapper.get(className)