60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
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package errors
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import (
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"fmt"
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)
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type QueryError struct {
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Err error `json:"-"` // Err holds underlying if available
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Message string `json:"message"`
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Locations []Location `json:"locations,omitempty"`
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Path []interface{} `json:"path,omitempty"`
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Rule string `json:"-"`
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ResolverError error `json:"-"`
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Extensions map[string]interface{} `json:"extensions,omitempty"`
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}
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type Location struct {
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Line int `json:"line"`
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Column int `json:"column"`
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}
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func (a Location) Before(b Location) bool {
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return a.Line < b.Line || (a.Line == b.Line && a.Column < b.Column)
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}
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func Errorf(format string, a ...interface{}) *QueryError {
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// similar to fmt.Errorf, Errorf will wrap the last argument if it is an instance of error
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var err error
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if n := len(a); n > 0 {
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if v, ok := a[n-1].(error); ok {
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err = v
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}
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}
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return &QueryError{
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Err: err,
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Message: fmt.Sprintf(format, a...),
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}
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}
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func (err *QueryError) Error() string {
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if err == nil {
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return "<nil>"
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}
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str := fmt.Sprintf("graphql: %s", err.Message)
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for _, loc := range err.Locations {
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str += fmt.Sprintf(" (line %d, column %d)", loc.Line, loc.Column)
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}
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return str
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}
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func (err *QueryError) Unwrap() error {
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if err == nil {
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return nil
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}
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return err.Err
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}
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var _ error = &QueryError{}
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