feat: foreign key violated error (go-gorm#193)

* feat: foreign key violated error

* ci: fixed ci workflow to be triggered for all pull requests

* test: fixed typo

---------

Co-authored-by: Saeid Saeidee <s.saeidee@sensysgatso.com>

.github/workflows/tests.yml

@@ -2,12 +2,7 @@ name: tests
 
 on:
   push:
-    branches:
-      - '**'
-      - '*'
   pull_request:
-    branches:
-      - master
 
 permissions:
   contents: read

error_translator.go

@@ -8,8 +8,9 @@ import (
 	"github.com/jackc/pgx/v5/pgconn"
 )
 
-var errCodes = map[string]string{
-	"uniqueConstraint": "23505",
+var errCodes = map[string]error{
+	"23505": gorm.ErrDuplicatedKey,
+	"23503": gorm.ErrForeignKeyViolated,
 }
 
 type ErrMessage struct {
@@ -22,8 +23,8 @@ type ErrMessage struct {
 // Since currently gorm supporting both pgx and pg drivers, only checking for pgx PgError types is not enough for translating errors, so we have additional error json marshal fallback.
 func (dialector Dialector) Translate(err error) error {
 	if pgErr, ok := err.(*pgconn.PgError); ok {
-		if pgErr.Code == errCodes["uniqueConstraint"] {
-			return gorm.ErrDuplicatedKey
+		if translatedErr, found := errCodes[pgErr.Code]; found {
+			return translatedErr
 		}
 		return err
 	}
@@ -39,8 +40,8 @@ func (dialector Dialector) Translate(err error) error {
 		return err
 	}
 
-	if errMsg.Code == errCodes["uniqueConstraint"] {
-		return gorm.ErrDuplicatedKey
+	if translatedErr, found := errCodes[errMsg.Code]; found {
+		return translatedErr
 	}
 	return err
 }

error_translator_test.go

@@ -0,0 +1,44 @@
+package postgres
+
+import (
+	"errors"
+	"github.com/jackc/pgx/v5/pgconn"
+	"gorm.io/gorm"
+	"testing"
+)
+
+func TestDialector_Translate(t *testing.T) {
+	type fields struct {
+		Config *Config
+	}
+	type args struct {
+		err error
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		args   args
+		want   error
+	}{
+		{
+			name: "it should return ErrDuplicatedKey error if the status code is 23505",
+			args: args{err: &pgconn.PgError{Code: "23505"}},
+			want: gorm.ErrDuplicatedKey,
+		},
+		{
+			name: "it should return ErrForeignKeyViolated error if the status code is 23503",
+			args: args{err: &pgconn.PgError{Code: "23503"}},
+			want: gorm.ErrForeignKeyViolated,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			dialector := Dialector{
+				Config: tt.fields.Config,
+			}
+			if err := dialector.Translate(tt.args.err); !errors.Is(err, tt.want) {
+				t.Errorf("Translate() expected error = %v, got error %v", err, tt.want)
+			}
+		})
+	}
+}

go.mod

@@ -4,7 +4,7 @@ go 1.18
 
 require (
 	github.com/jackc/pgx/v5 v5.3.1
-	gorm.io/gorm v1.25.0
+	gorm.io/gorm v1.25.2-0.20230530020048-26663ab9bf55
 )
 
 require (

go.sum

@@ -25,3 +25,5 @@ gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gorm.io/gorm v1.25.0 h1:+KtYtb2roDz14EQe4bla8CbQlmb9dN3VejSai3lprfU=
 gorm.io/gorm v1.25.0/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k=
+gorm.io/gorm v1.25.2-0.20230530020048-26663ab9bf55 h1:sC1Xj4TYrLqg1n3AN10w871An7wJM0gzgcm8jkIkECQ=
+gorm.io/gorm v1.25.2-0.20230530020048-26663ab9bf55/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k=