Fix 'Could not find the object on the server.' error while refreshing the check constraint. Fixes #4966.

docs/en_US/release_notes_4_16.rst

@@ -45,4 +45,5 @@ Bug fixes
 | `Issue #4953 <https://redmine.postgresql.org/issues/4953>`_ -  Fix an issue where pgAdmin4 unable to retrieve table node if the trigger is already disabled and the user clicks on Enable All.
 | `Issue #4964 <https://redmine.postgresql.org/issues/4964>`_ -  Fix an issue where length and precision are not removed from table/column dialog.
 | `Issue #4965 <https://redmine.postgresql.org/issues/4965>`_ -  Fix an issue where the Interval data type is not displayed in the properties dialog of table/column.
+| `Issue #4966 <https://redmine.postgresql.org/issues/4966>`_ -  Fix 'Could not find the object on the server.' error while refreshing the check constraint.
 | `Issue #4978 <https://redmine.postgresql.org/issues/4978>`_ -  Fix pgAdmin4 failed to start issue after upgrading to version 4.15.

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/constraints/check_constraint/__init__.py

@@ -289,6 +289,7 @@ class CheckConstraintView(PGChildNodeView):
         """
         SQL = render_template("/".join([self.template_path,
                                         'nodes.sql']),
+                              tid=tid,
                               cid=cid)
         status, rset = self.conn.execute_2darray(SQL)
 

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/check_constraint/sql/9.2_plus/nodes.sql

@@ -2,6 +2,7 @@ SELECT c.oid, conname as name,
     NOT convalidated as convalidated
     FROM pg_constraint c
 WHERE contype = 'c'
-{% if tid %}
     AND conrelid = {{ tid }}::oid
+{% if cid %}
+    AND c.oid = {{ cid }}::oid
 {% endif %}

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/templates/check_constraint/sql/default/nodes.sql

@@ -1,6 +1,7 @@
 SELECT c.oid, conname as name
     FROM pg_constraint c
 WHERE contype = 'c'
-{% if tid %}
     AND conrelid = {{ tid }}::oid
+{% if cid %}
+    AND c.oid = {{ cid }}::oid
 {% endif %}