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Add support for JSON to slice cast #333

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Add support for JSON to slice cast #333

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8 changes: 8 additions & 0 deletions slice.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
package cast

import (
"encoding/json"
"fmt"
"reflect"
"strings"
Expand Down Expand Up @@ -90,8 +91,15 @@ func ToStringSliceE(i any) ([]string, error) {

var a []string

if nonPointerI, ok := indirect(i); ok {
i = nonPointerI
}

switch v := i.(type) {
case string:
if err := json.Unmarshal([]byte(v), &a); err == nil {
return a, nil
}
return strings.Fields(v), nil
case any:
str, err := ToStringE(v)
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2 changes: 2 additions & 0 deletions slice_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -258,6 +258,8 @@ func TestStringSlice(t *testing.T) {
{[]any{1, 3}, []string{"1", "3"}, false},
{any(1), []string{"1"}, false},
{[]error{errors.New("a"), errors.New("b")}, []string{"a", "b"}, false},
{"[\"a\", \"b\"]", []string{"a", "b"}, false},
{"a b", []string{"a", "b"}, false},

// Failure cases
{nil, nil, true},
Expand Down