fixed has_many stopped working if field names are identical (#4387)

* fixed belongs_to & has_one reversed if field same

* hasmany same foreign key bug fixed and test added

schema/relationship.go

@@ -408,7 +408,7 @@ func (schema *Schema) guessRelation(relation *Relationship, field *Field, cgl gu
 			ff := foreignSchema.LookUpField(foreignKey)
 			pf := primarySchema.LookUpField(foreignKey)
 			isKeySame := utils.ExistsIn(foreignKey, &relation.primaryKeys)
-			if ff == nil || (pf != nil && ff != nil && schema == primarySchema && primarySchema != foreignSchema && !isKeySame) {
+			if ff == nil || (pf != nil && ff != nil && schema == primarySchema && primarySchema != foreignSchema && !isKeySame && field.IndirectFieldType.Kind() == reflect.Struct) {
 				reguessOrErr()
 				return
 			} else {

schema/relationship_test.go

@@ -501,3 +501,22 @@ func TestBelongsToWithSameForeignKey(t *testing.T) {
 		References: []Reference{{"ID", "Profile", "ProfileRefer", "User", "", false}},
 	})
 }
+
+func TestHasManySameForeignKey(t *testing.T) {
+	type Profile struct {
+		gorm.Model
+		Name      string
+		UserRefer uint
+	}
+
+	type User struct {
+		gorm.Model
+		UserRefer uint
+		Profile   []Profile `gorm:"ForeignKey:UserRefer"`
+	}
+
+	checkStructRelation(t, &User{}, Relation{
+		Name: "Profile", Type: schema.HasMany, Schema: "User", FieldSchema: "Profile",
+		References: []Reference{{"ID", "User", "UserRefer", "Profile", "", true}},
+	})
+}