Updated dependencies and error helpers

Author: mxmauro

errors.go

@@ -3,6 +3,7 @@ package postgres
 import (
 	"errors"
 	"net"
+	"strings"
 )
 
 // -----------------------------------------------------------------------------
@@ -40,6 +41,9 @@ type NoRowsError struct {
 
 // Unwrap returns the underlying error.
 func (e *Error) Unwrap() error {
+	if e == nil {
+		return nil
+	}
 	return e.err
 }
 
@@ -48,11 +52,43 @@ func (e *Error) Error() string {
 	if e == nil {
 		return ""
 	}
-	s := e.message
+
+	sb := strings.Builder{}
+	_, _ = sb.WriteString(e.message)
 	if e.err != nil {
-		s += " [err=" + e.err.Error() + "]"
+		_, _ = sb.WriteString(" [err=" + e.err.Error() + "]")
+	}
+	if e.Details != nil {
+		_, _ = sb.WriteString(" [code=" + e.Details.Code + "]")
+	}
+	return sb.String()
+}
+
+func (e *Error) IsDuplicateKeyError() bool {
+	if e != nil && e.Details != nil {
+		if e.Details.Code == "23505" {
+			return true
+		}
+	}
+	return false
+}
+
+func (e *Error) IsConstraintViolationError() bool {
+	if e != nil && e.Details != nil {
+		switch e.Details.Code {
+		case "23000":
+			return true
+		case "23502":
+			return true
+		case "23503":
+			return true
+		case "23514":
+			return true
+		case "23P01":
+			return true
+		}
 	}
-	return s
+	return false
 }
 
 func (e *NoRowsError) Error() string {
@@ -68,6 +104,24 @@ func IsDatabaseError(err error) bool {
 	return errors.As(err, &e)
 }
 
+func IsDuplicateKeyError(err error) bool {
+	var e *Error
+
+	if errors.As(err, &e) {
+		return e.IsDuplicateKeyError()
+	}
+	return false
+}
+
+func IsConstraintViolationError(err error) bool {
+	var e *Error
+
+	if errors.As(err, &e) {
+		return e.IsConstraintViolationError()
+	}
+	return false
+}
+
 // IsNoRowsError returns true if the given error is the result of returning an empty result set.
 func IsNoRowsError(err error) bool {
 	var e *NoRowsError

go.mod

@@ -2,7 +2,7 @@ module github.com/randlabs/go-postgres
 
 go 1.19
 
-require github.com/jackc/pgx/v5 v5.5.4
+require github.com/jackc/pgx/v5 v5.6.0
 
 require (
 	github.com/jackc/pgpassfile v1.0.0 // indirect

go.sum

@@ -4,8 +4,8 @@ github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsI
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20231201235250-de7065d80cb9 h1:L0QtFUgDarD7Fpv9jeVMgy/+Ec0mtnmYuImjTz6dtDA=
 github.com/jackc/pgservicefile v0.0.0-20231201235250-de7065d80cb9/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
-github.com/jackc/pgx/v5 v5.5.4 h1:Xp2aQS8uXButQdnCMWNmvx6UysWQQC+u1EoizjguY+8=
-github.com/jackc/pgx/v5 v5.5.4/go.mod h1:ez9gk+OAat140fv9ErkZDYFWmXLfV+++K0uAOiwgm1A=
+github.com/jackc/pgx/v5 v5.6.0 h1:SWJzexBzPL5jb0GEsrPMLIsi/3jOo7RHlzTjcAeDrPY=
+github.com/jackc/pgx/v5 v5.6.0/go.mod h1:DNZ/vlrUnhWCoFGxHAG8U2ljioxukquj7utPDgtQdTw=
 github.com/jackc/puddle/v2 v2.2.1 h1:RhxXJtFG022u4ibrCSMSiu5aOq1i77R3OHKNJj77OAk=
 github.com/jackc/puddle/v2 v2.2.1/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=