Add CREATED_AT and CREATED_BY columns.

Author: cssru

src/main/resources/liquibase/version/0.4/2016-09-28--add_creator_data_to_series_sales.xml

@@ -6,20 +6,23 @@
 		http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-3.0.xsd">
 
 	<changeSet id="add-creator-columns-to-series_sales_table" author="cssru" context="scheme">
-		<comment>Adds created_at and created_by columns to series_sales table and fills them with default data</comment>
 
 		<addColumn tableName="series_sales">
-			<column name="created_at" type="DATETIME" defaultValueComputed="${NOW}">
-				<constraints nullable="false" />
-			</column>
+			<column name="created_at" type="DATETIME" />
 			<column name="created_by" type="INTEGER"
-					defaultValueComputed="SELECT u.id FROM users u WHERE u.role = 'ADMIN'">
+					defaultValueComputed="SELECT u.id FROM users u WHERE u.role = 'ADMIN' LIMIT 1">
 				<constraints nullable="false"
 					references="users(id)"
-					foreignKeyName="fk_series_sales_created_by" />
+					foreignKeyName="fk_series_sales_users_id" />
 			</column>
 		</addColumn>
 
+		<update tableName="series_sales">
+			<column name="created_at" type="DATETIME" value="NOW()" />
+		</update>
+		
+		<addNotNullConstraint columnName="created_at" columnDataType="DATETIME" tableName="series_sales" />
+		
 	</changeSet>
 
 </databaseChangeLog>