implemented type match checking for types on schema id instead of type const

src/lib.rs

@@ -9,7 +9,7 @@ use std::borrow::Cow;
 use std::collections::hash_map::Entry;
 use std::{collections::HashMap, sync::RwLock};
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 enum SchemaType {
   Enum,
   Type,
@@ -20,6 +20,7 @@ enum SchemaType {
 struct BoonCache {
   schemas: Schemas,
   id_to_index: HashMap<String, SchemaIndex>,
+  id_to_type: HashMap<String, SchemaType>,
 }
 
 // Structure to hold error information without lifetimes
@@ -35,6 +36,7 @@ lazy_static! {
   static ref SCHEMA_CACHE: RwLock<BoonCache> = RwLock::new(BoonCache {
     schemas: Schemas::new(),
     id_to_index: HashMap::new(),
+    id_to_type: HashMap::new(),
   });
 }
 
@@ -49,6 +51,7 @@ fn cache_json_schemas(enums: JsonB, types: JsonB, puncs: JsonB) -> JsonB {
   *cache = BoonCache {
     schemas: Schemas::new(),
     id_to_index: HashMap::new(),
+    id_to_type: HashMap::new(),
   };
 
   // Create the boon compiler and enable format assertions
@@ -85,6 +88,7 @@ fn cache_json_schemas(enums: JsonB, types: JsonB, puncs: JsonB) -> JsonB {
                   }));
                 } else {
                   all_schema_ids.push(schema_id.to_string());
+                  cache.id_to_type.insert(schema_id.to_string(), SchemaType::Enum);
                 }
               }
             }
@@ -119,6 +123,7 @@ fn cache_json_schemas(enums: JsonB, types: JsonB, puncs: JsonB) -> JsonB {
                   }));
                 } else {
                   all_schema_ids.push(schema_id.to_string());
+                  cache.id_to_type.insert(schema_id.to_string(), SchemaType::Type);
                 }
               }
             }
@@ -166,6 +171,7 @@ fn cache_json_schemas(enums: JsonB, types: JsonB, puncs: JsonB) -> JsonB {
                     }));
                   } else {
                     all_schema_ids.push(schema_id.to_string());
+                    cache.id_to_type.insert(schema_id.to_string(), schema_type_for_def);
                   }
                 }
               }
@@ -322,6 +328,47 @@ fn apply_strict_validation_recursive(schema: &mut Value, inside_conditional: boo
   }
 }
 
+fn validate_type_against_schema_id(instance: &Value, schema_id: &str) -> JsonB {
+  let expected_type = schema_id.split('.').next().unwrap_or(schema_id);
+
+  if let Some(actual_type) = instance.get("type").and_then(|v| v.as_str()) {
+    if actual_type == expected_type {
+      return JsonB(json!({ "response": "success" }));
+    }
+  }
+
+  // If we reach here, validation failed. Now we build the specific error.
+  let (message, cause, context) = 
+  if let Some(actual_type) = instance.get("type").and_then(|v| v.as_str()) {
+    // This handles the case where the type is a string but doesn't match.
+    (
+      format!("Instance type '{}' does not match expected type '{}' derived from schema ID", actual_type, expected_type),
+      json!({ "expected": expected_type, "actual": actual_type }),
+      json!(actual_type)
+    )
+  } else {
+    // This handles the case where 'type' is missing or not a string.
+    (
+      "Instance 'type' property is missing or not a string".to_string(),
+      json!("The 'type' property must be a string and is required for this validation."),
+      instance.get("type").unwrap_or(&Value::Null).clone()
+    )
+  };
+
+  JsonB(json!({
+    "errors": [{
+      "code": "TYPE_MISMATCH",
+      "message": message,
+      "details": {
+        "path": "/type",
+        "context": context,
+        "cause": cause,
+        "schema": schema_id
+      }
+    }]
+  }))
+}
+
 #[pg_extern(strict, parallel_safe)]
 fn validate_json_schema(schema_id: &str, instance: JsonB) -> JsonB {
   let cache = SCHEMA_CACHE.read().unwrap();
@@ -340,7 +387,16 @@ fn validate_json_schema(schema_id: &str, instance: JsonB) -> JsonB {
     Some(sch_index) => {
       let instance_value: Value = instance.0;
       match cache.schemas.validate(&instance_value, *sch_index) {
-        Ok(_) => JsonB(json!({ "response": "success" })),
+        Ok(_) => {
+          // After standard validation, perform custom type check if it's a Type schema
+          if let Some(&schema_type) = cache.id_to_type.get(schema_id) {
+            if schema_type == SchemaType::Type {
+              return validate_type_against_schema_id(&instance_value, schema_id);
+            }
+          }
+          // For non-Type schemas, or if type not found (shouldn't happen), success.
+          JsonB(json!({ "response": "success" }))
+        }
         Err(validation_error) => {
           let mut error_list = Vec::new();
           collect_errors(&validation_error, &mut error_list);
@@ -961,6 +1017,7 @@ fn clear_json_schemas() -> JsonB {
   *cache = BoonCache {
     schemas: Schemas::new(),
     id_to_index: HashMap::new(),
+    id_to_type: HashMap::new(),
   };
   JsonB(json!({ "response": "success" }))
 }

src/schemas.rs

@@ -761,3 +761,45 @@ pub fn title_override_schemas() -> JsonB {
 
   cache_json_schemas(jsonb(enums), jsonb(types), jsonb(puncs))
 }
+
+pub fn type_matching_schemas() -> JsonB {
+  let enums = json!([]);
+  let types = json!([
+    {
+      "name": "entity",
+      "schemas": [{
+        "$id": "entity",
+        "type": "object",
+        "properties": { "type": { "type": "string" }, "name": { "type": "string" } },
+        "required": ["type", "name"]
+      }]
+    },
+    {
+      "name": "job",
+      "schemas": [{
+        "$id": "job",
+        "$ref": "entity",
+        "properties": { "job_id": { "type": "string" } },
+        "required": ["job_id"]
+      }]
+    },
+    {
+      "name": "super_job",
+      "schemas": [
+        {
+          "$id": "super_job",
+          "$ref": "job",
+          "properties": { "manager_id": { "type": "string" } },
+          "required": ["manager_id"]
+        },
+        {
+          "$id": "super_job.short",
+          "$ref": "super_job",
+          "properties": { "name": { "maxLength": 10 } }
+        }
+      ]
+    }
+  ]);
+  let puncs = json!([]);
+  cache_json_schemas(jsonb(enums), jsonb(types), jsonb(puncs))
+}

src/tests.rs

@@ -506,6 +506,7 @@ fn test_validate_property_merging() {
   // entity (id, name) + user (password) + person (first_name, last_name)
   
   let valid_person_with_all_properties = json!({
+    "type": "person", // Added to satisfy new type check
     // From entity
     "id": "550e8400-e29b-41d4-a716-446655440000",
     "name": "John Doe",
@@ -523,6 +524,7 @@ fn test_validate_property_merging() {
   
   // Test that properties validate according to their schema definitions across the chain
   let invalid_mixed_properties = json!({
+    "type": "person", // Added to satisfy new type check
     "id": "550e8400-e29b-41d4-a716-446655440000",
     "name": "John Doe",
     "password": "short", // Too short from user schema  
@@ -546,15 +548,13 @@ fn test_validate_required_merging() {
   // user: ["password"] (conditional when type=user)
   // person: ["first_name", "last_name"] (conditional when type=person)
   
-  let missing_all_required = json!({});
+  let missing_all_required = json!({ "type": "person" }); // Add type to pass initial check
   
   let result = validate_json_schema("person", jsonb(missing_all_required));
-  // Should fail for all required fields across inheritance chain
+  // Should fail for all required fields across inheritance chain, except for the conditional 'password'
-  assert_error_count(&result, 6); // id, type, created_by, password, first_name, last_name
+  assert_error_count(&result, 4); // id, created_by, first_name, last_name
   assert_has_error(&result, "REQUIRED_FIELD_MISSING", "/id");
-  assert_has_error(&result, "REQUIRED_FIELD_MISSING", "/type");
   assert_has_error(&result, "REQUIRED_FIELD_MISSING", "/created_by");
-  assert_has_error(&result, "REQUIRED_FIELD_MISSING", "/password");
   assert_has_error(&result, "REQUIRED_FIELD_MISSING", "/first_name");
   assert_has_error(&result, "REQUIRED_FIELD_MISSING", "/last_name");
   
@@ -777,14 +777,69 @@ fn test_validate_title_override() {
   // Test that a schema with an overridden title still inherits validation keywords correctly.
   
   // This instance is valid because it provides the 'name' required by the base schema.
-  let valid_instance = json!({ "name": "Test Name" });
+  let valid_instance = json!({ "type": "override_with_title", "name": "Test Name" });
   let result_valid = validate_json_schema("override_with_title", jsonb(valid_instance));
   assert_success(&result_valid);
 
   // This instance is invalid because it's missing the 'name' required by the base schema.
   // This proves that validation keywords are inherited even when metadata keywords are overridden.
-  let invalid_instance = json!({});
+  let invalid_instance = json!({ "type": "override_with_title" });
   let result_invalid = validate_json_schema("override_with_title", jsonb(invalid_instance));
   assert_error_count(&result_invalid, 1);
   assert_has_error(&result_invalid, "REQUIRED_FIELD_MISSING", "/name");
 }
+
+#[pg_test]
+fn test_validate_type_matching() {
+  let cache_result = type_matching_schemas();
+  assert_success(&cache_result);
+
+  // 1. Test 'job' which extends 'entity'
+  let valid_job = json!({
+    "type": "job",
+    "name": "my job",
+    "job_id": "job123"
+  });
+  let result_valid_job = validate_json_schema("job", jsonb(valid_job));
+  assert_success(&result_valid_job);
+
+  let invalid_job = json!({
+    "type": "not_job",
+    "name": "my job",
+    "job_id": "job123"
+  });
+  let result_invalid_job = validate_json_schema("job", jsonb(invalid_job));
+  assert_error_count(&result_invalid_job, 1);
+  assert_has_error(&result_invalid_job, "TYPE_MISMATCH", "/type");
+
+  // 2. Test 'super_job' which extends 'job'
+  let valid_super_job = json!({
+    "type": "super_job",
+    "name": "my super job",
+    "job_id": "job123",
+    "manager_id": "mgr1"
+  });
+  let result_valid_super_job = validate_json_schema("super_job", jsonb(valid_super_job));
+  assert_success(&result_valid_super_job);
+
+  // 3. Test 'super_job.short' which should still expect type 'super_job'
+  let valid_short_super_job = json!({
+    "type": "super_job",
+    "name": "short", // maxLength: 10
+    "job_id": "job123",
+    "manager_id": "mgr1"
+  });
+  let result_valid_short = validate_json_schema("super_job.short", jsonb(valid_short_super_job));
+  assert_success(&result_valid_short);
+
+  let invalid_short_super_job = json!({
+    "type": "job", // Should be 'super_job'
+    "name": "short",
+    "job_id": "job123",
+    "manager_id": "mgr1"
+  });
+  let result_invalid_short = validate_json_schema("super_job.short", jsonb(invalid_short_super_job));
+  assert_error_count(&result_invalid_short, 1);
+  let error = find_error_with_code_and_path(&result_invalid_short, "TYPE_MISMATCH", "/type");
+  assert_error_message_contains(error, "Instance type 'job' does not match expected type 'super_job'");
+}