<fix>[compute]: first create of zone set default

Resolves: ZSTAC-75952

Change-Id: I6c7a6f627a6c76796e656c6b7962796a7570736b

Author: lin.ma

compute/src/main/java/org/zstack/compute/zone/ZoneManagerImpl.java

@@ -5,10 +5,7 @@
 import org.zstack.core.cloudbus.CloudBus;
 import org.zstack.core.cloudbus.MessageSafe;
 import org.zstack.core.componentloader.PluginRegistry;
-import org.zstack.core.db.DatabaseFacade;
-import org.zstack.core.db.DbEntityLister;
-import org.zstack.core.db.SQL;
-import org.zstack.core.db.SQLBatch;
+import org.zstack.core.db.*;
 import org.zstack.core.errorcode.ErrorFacade;
 import org.zstack.core.thread.ChainTask;
 import org.zstack.core.thread.SyncTaskChain;
@@ -160,6 +157,11 @@ protected void scripts() {
     }
 
     private void createZone(APICreateZoneMsg msg, ReturnValueCompletion<ZoneInventory> completion) {
+        Long existCount = Q.New(ZoneVO.class).count();
+        if (existCount == 0) {
+            msg.setDefault(true);
+        }
+
         if (msg.getDefault() == null || !msg.getDefault()) {
             completion.success(createZoneFromApiMessage(msg));
             return;

test/src/test/groovy/org/zstack/test/integration/compute/ZoneCase.groovy

@@ -40,6 +40,7 @@ class ZoneCase extends SubCase {
             testQueryDefaultZone()
             testDeleteDefaultZone()
             testBatchUnsetDefaultZone()
+            testFirstZoneSetDefaultZone()
         }
     }
 
@@ -232,4 +233,14 @@ class ZoneCase extends SubCase {
                 .eq(ZoneVO_.isDefault, true)
                 .count() == 0
     }
+
+    void testFirstZoneSetDefaultZone() {
+        ZoneInventory zone = createZone {
+            name = "FirstZone"
+            description = "first zone"
+        } as ZoneInventory
+
+        assert zone != null
+        assert zone.isDefault
+    }
 }