HCK-13024: fix relationship without schema (#164)

Co-authored-by: Vitalii Bedletskyi <[email protected]>

Author: AlikRakhmonov

forward_engineering/ddlProvider/ddlProvider.js

@@ -428,8 +428,8 @@ module.exports = (baseProvider, options, app) => {
 				additionalPropertiesForForeignKey(customProperties);
 
 			const foreignKeyStatement = assignTemplates(templates.createForeignKey, {
-				primaryTable: getNamePrefixedWithSchemaName(primaryTable, primarySchemaName || schemaData.schemaName),
-				foreignTable: getNamePrefixedWithSchemaName(foreignTable, foreignSchemaName || schemaData.schemaName),
+				primaryTable: getNamePrefixedWithSchemaName(primaryTable, primarySchemaName || schemaData?.schemaName),
+				foreignTable: getNamePrefixedWithSchemaName(foreignTable, foreignSchemaName || schemaData?.schemaName),
 				name: name ? wrapInQuotes(name) : '',
 				foreignKey: areKeysActivated ? foreignKeysToString(foreignKey) : foreignActiveKeysToString(foreignKey),
 				primaryKey: areKeysActivated ? foreignKeysToString(primaryKey) : foreignActiveKeysToString(primaryKey),