Fix slug uniqueness validation

src/lib/entityValidationSchemas.ts

@@ -345,19 +345,86 @@ export async function validateEntityData(
     }
   }
 
-  // Check slug uniqueness (async)
+  // Check slug uniqueness (async) - only if slug has changed
   if (validData.slug && typeof validData.slug === 'string') {
-    const isSlugUnique = await checkSlugUniqueness(
-      entityType, 
-      validData.slug, 
-      typeof validData.id === 'string' ? validData.id : undefined
-    );
-    if (!isSlugUnique) {
-      blockingErrors.push({
-        field: 'slug',
-        message: 'This slug is already in use. Manually check if this entity already exists, and reject if so. Otherwise, escalate to an admin for manual editing of the slug.',
-        severity: 'blocking',
-      });
+    // Extract the correct ID field based on entity type
+    let entityId: string | undefined;
+    
+    switch (entityType) {
+      case 'park':
+        entityId = typeof validData.park_id === 'string' ? validData.park_id : undefined;
+        break;
+      case 'ride':
+        entityId = typeof validData.ride_id === 'string' ? validData.ride_id : undefined;
+        break;
+      case 'manufacturer':
+      case 'designer':
+      case 'operator':
+      case 'property_owner':
+        entityId = typeof validData.company_id === 'string' 
+          ? validData.company_id 
+          : (typeof validData.id === 'string' ? validData.id : undefined);
+        break;
+      case 'ride_model':
+        entityId = typeof validData.ride_model_id === 'string' 
+          ? validData.ride_model_id 
+          : (typeof validData.id === 'string' ? validData.id : undefined);
+        break;
+      default:
+        entityId = typeof validData.id === 'string' ? validData.id : undefined;
+    }
+    
+    // If we have an entity ID, check if slug has actually changed
+    let shouldCheckUniqueness = true;
+    if (entityId) {
+      const tableName = getTableNameFromEntityType(entityType);
+      
+      // Use switch to avoid TypeScript type instantiation issues
+      let originalSlug: string | null = null;
+      switch (tableName) {
+        case 'parks': {
+          const { data } = await supabase.from('parks').select('slug').eq('id', entityId).single();
+          originalSlug = data?.slug || null;
+          break;
+        }
+        case 'rides': {
+          const { data } = await supabase.from('rides').select('slug').eq('id', entityId).single();
+          originalSlug = data?.slug || null;
+          break;
+        }
+        case 'companies': {
+          const { data } = await supabase.from('companies').select('slug').eq('id', entityId).single();
+          originalSlug = data?.slug || null;
+          break;
+        }
+        case 'ride_models': {
+          const { data } = await supabase.from('ride_models').select('slug').eq('id', entityId).single();
+          originalSlug = data?.slug || null;
+          break;
+        }
+      }
+      
+      // If slug hasn't changed, skip uniqueness check
+      if (originalSlug && originalSlug === validData.slug) {
+        shouldCheckUniqueness = false;
+      }
+    }
+    
+    // Only check uniqueness if this is a new entity or slug has changed
+    if (shouldCheckUniqueness) {
+      const isSlugUnique = await checkSlugUniqueness(
+        entityType, 
+        validData.slug, 
+        entityId
+      );
+      
+      if (!isSlugUnique) {
+        blockingErrors.push({
+          field: 'slug',
+          message: 'This slug is already in use. Manually check if this entity already exists, and reject if so. Otherwise, escalate to an admin for manual editing of the slug.',
+          severity: 'blocking',
+        });
+      }
     }
   }