fix(mssql): match aggregate errors (#14784)

* fix(mssql): match aggregate errors

* fix(mssql): wrap for loops in if statements

Co-authored-by: Sascha Depold <sdepold@users.noreply.github.com>

src/dialects/mssql/query.js

@@ -351,6 +351,20 @@ export class MsSqlQuery extends AbstractQuery {
       });
     }
 
+    if (err.errors) {
+      for (const error of err.errors) {
+        match = error.message.match(/Could not create constraint or index. See previous errors./);
+        if (match && match.length > 0) {
+          return new sequelizeErrors.ForeignKeyConstraintError({
+            fields: null,
+            index: match[1],
+            cause: error,
+            stack: errStack,
+          });
+        }
+      }
+    }
+
     match = err.message.match(/Could not drop constraint. See previous errors./);
     if (match && match.length > 0) {
       let constraint = err.sql.match(/(?:constraint|index) \[(.+?)]/i);
@@ -367,6 +381,26 @@ export class MsSqlQuery extends AbstractQuery {
       });
     }
 
+    if (err.errors) {
+      for (const error of err.errors) {
+        match = error.message.match(/Could not drop constraint. See previous errors./);
+        if (match && match.length > 0) {
+          let constraint = err.sql.match(/(?:constraint|index) \[(.+?)]/i);
+          constraint = constraint ? constraint[1] : undefined;
+          let table = err.sql.match(/table \[(.+?)]/i);
+          table = table ? table[1] : undefined;
+
+          return new sequelizeErrors.UnknownConstraintError({
+            message: match[1],
+            constraint,
+            table,
+            cause: error,
+            stack: errStack,
+          });
+        }
+      }
+    }
+
     return new sequelizeErrors.DatabaseError(err, { stack: errStack });
   }