diff --git a/src/drivers/AbstractDriver.ts b/src/drivers/AbstractDriver.ts
index 7db7feb..fb9d855 100644
--- a/src/drivers/AbstractDriver.ts
+++ b/src/drivers/AbstractDriver.ts
@@ -372,7 +372,7 @@ export default abstract class AbstractDriver {
                 );
 
                 let fieldType = "";
-                if (isOneToMany) {
+                if (ownerRelation.relationType === "OneToMany") {
                     fieldType = `${ownerColumns[0].tscType}[]`;
                 } else {
                     fieldType = ownerColumns[0].tscType;
diff --git a/src/drivers/PostgresDriver.ts b/src/drivers/PostgresDriver.ts
index 6ac3d1b..c3f4f86 100644
--- a/src/drivers/PostgresDriver.ts
+++ b/src/drivers/PostgresDriver.ts
@@ -73,7 +73,8 @@ export default class PostgresDriver extends AbstractDriver {
             character_maximum_length: number;
             numeric_precision: number;
             numeric_scale: number;
-            isidentity: string;
+            isidentity: string; // SERIAL identity type
+            is_identity: string; // reccommended INDENTITY type for pg > 10
             isunique: string;
             enumvalues: string | null;
             /* eslint-enable camelcase */
@@ -82,6 +83,7 @@ export default class PostgresDriver extends AbstractDriver {
                 .query(`SELECT table_name,column_name,udt_name,column_default,is_nullable,
                     data_type,character_maximum_length,numeric_precision,numeric_scale,
                     case when column_default LIKE 'nextval%' then 'YES' else 'NO' end isidentity,
+                    is_identity,
         			(SELECT count(*)
             FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS tc
                 inner join INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE cu
@@ -114,7 +116,9 @@ export default class PostgresDriver extends AbstractDriver {
                     if (resp.isunique === "1") options.unique = true;
 
                     const generated =
-                        resp.isidentity === "YES" ? true : undefined;
+                        resp.isidentity === "YES" || resp.is_identity === "YES"
+                            ? true
+                            : undefined;
                     const defaultValue = generated
                         ? undefined
                         : PostgresDriver.ReturnDefaultValueFunction(
diff --git a/test/integration/github-issues/65/entity/PostReader.ts b/test/integration/github-issues/65/entity/PostReader.ts
index 37a0462..0a7663c 100644
--- a/test/integration/github-issues/65/entity/PostReader.ts
+++ b/test/integration/github-issues/65/entity/PostReader.ts
@@ -26,5 +26,5 @@ export class PostReader {
     post: Post;
 
     @RelationId((postReader: PostReader) => postReader.post)
-    postId: number[];
+    postId: number;
 }