feat: add field max length

changelog.md

@@ -22,6 +22,7 @@
 - [#4436](https://github.com/ignite/cli/pull/4436) Return tx hash to the faucet API
 - [#4437](https://github.com/ignite/cli/pull/4437) Remove module placeholders
 - [#4289](https://github.com/ignite/cli/pull/4289), [#4423](https://github.com/ignite/cli/pull/4423), [#4432](https://github.com/ignite/cli/pull/4432) Cosmos SDK v0.52 support
+- [#4480](https://github.com/ignite/cli/pull/4480) Add field max length
 
 ### Changes
 

ignite/services/scaffolder/component.go

@@ -193,7 +193,7 @@ func checkGoReservedWord(name string) error {
 		"uintptr":
 		return errors.Errorf("%s is a Go built-in identifier", name)
 	}
-	return nil
+	return checkMaxLength(name)
 }
 
 // containsCustomTypes returns true if the list of fields contains at least one custom type.

ignite/services/scaffolder/type.go

@@ -19,6 +19,8 @@ import (
 	"github.com/ignite/cli/v29/ignite/templates/typed/singleton"
 )
 
+const maxLength = 126
+
 // AddTypeOption configures options for AddType.
 type AddTypeOption func(*addTypeOptions)
 
@@ -214,6 +216,14 @@ func (s Scaffolder) AddType(
 	return s.Run(append(gens, g)...)
 }
 
+// checkMaxLength checks if the index length exceeds the maximum allowed length
+func checkMaxLength(name string) error {
+	if len(name) > maxLength {
+		return errors.Errorf("index exceeds maximum allowed length of %d characters", maxLength)
+	}
+	return nil
+}
+
 // checkForbiddenTypeIndex returns true if the name is forbidden as a index name.
 func checkForbiddenTypeIndex(index string) error {
 	indexSplit := strings.Split(index, datatype.Separator)

ignite/services/scaffolder/type_test.go

@@ -6,6 +6,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/ignite/cli/v29/ignite/pkg/multiformatname"
+	"github.com/ignite/cli/v29/ignite/pkg/randstr"
 	"github.com/ignite/cli/v29/ignite/templates/field"
 	"github.com/ignite/cli/v29/ignite/templates/field/datatype"
 )
@@ -216,5 +217,36 @@ func TestCheckForbiddenTypeIndexField(t *testing.T) {
 	}
 }
 
-func TestAddType(_ *testing.T) {
+func Test_checkMaxLength(t *testing.T) {
+	tests := []struct {
+		desc        string
+		name        string
+		shouldError bool
+	}{
+		{
+			desc:        "should pass with valid name",
+			name:        "validName",
+			shouldError: false,
+		},
+		{
+			desc:        "should fail with name exceeding max length",
+			name:        randstr.Runes(257),
+			shouldError: true,
+		},
+		{
+			desc:        "should pass with name at max length",
+			name:        randstr.Runes(256),
+			shouldError: false,
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.desc, func(t *testing.T) {
+			err := checkMaxLength(tc.name)
+			if tc.shouldError {
+				require.Error(t, err)
+				return
+			}
+			require.NoError(t, err)
+		})
+	}
 }