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Add field tag to ignore migration (#4028)

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* Add field tag to ignore migration

* Fix null value with space

* refactor migration tag
This commit is contained in:
yrong1997 2021-02-09 16:03:02 +08:00 committed by GitHub
parent 883c32e59a
commit 2ba612e805
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 35 additions and 14 deletions
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1
.gitignore vendored
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@ -2,3 +2,4 @@ TODO*
documents
coverage.txt
_book
.idea

2
migrator/migrator.go
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@ -396,7 +396,7 @@ func (m Migrator) MigrateColumn(value interface{}, field *schema.Field, columnTy
}
}
if alterColumn {
if alterColumn && !field.IgnoreMigration {
return m.DB.Migrator().AlterColumn(value, field.Name)
}

16
schema/field.go
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@ -70,6 +70,7 @@ type Field struct {
ReflectValueOf func(reflect.Value) reflect.Value
ValueOf func(reflect.Value) (value interface{}, zero bool)
Set func(reflect.Value, interface{}) error
IgnoreMigration bool
}
func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
@ -189,6 +190,7 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
}
// default value is function or null or blank (primary keys)
field.DefaultValue = strings.TrimSpace(field.DefaultValue)
skipParseDefaultValue := strings.Contains(field.DefaultValue, "(") &&
strings.Contains(field.DefaultValue, ")") || strings.ToLower(field.DefaultValue) == "null" || field.DefaultValue == ""
switch reflect.Indirect(fieldValue).Kind() {
@ -295,11 +297,23 @@ func (schema *Schema) ParseField(fieldStruct reflect.StructField) *Field {
}
// setup permission
if _, ok := field.TagSettings["-"]; ok {
if val, ok := field.TagSettings["-"]; ok {
val = strings.ToLower(strings.TrimSpace(val))
switch val {
case "-":
field.Creatable = false
field.Updatable = false
field.Readable = false
field.DataType = ""
case "all":
field.Creatable = false
field.Updatable = false
field.Readable = false
field.DataType = ""
field.IgnoreMigration = true
case "migration":
field.IgnoreMigration = true
}
}
if v, ok := field.TagSettings["->"]; ok {

6
tests/migrate_test.go
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@ -66,6 +66,7 @@ func TestSmartMigrateColumn(t *testing.T) {
Name string `gorm:"size:128"`
Salary float64 `gorm:"precision:2"`
Birthday time.Time `gorm:"precision:2"`
NameIgnoreMigration string `gorm:"size:100"`
}
if err := DB.Table("user_migrate_columns").AutoMigrate(&UserMigrateColumn2{}); err != nil {
@ -99,6 +100,7 @@ func TestSmartMigrateColumn(t *testing.T) {
Name string `gorm:"size:256"`
Salary float64 `gorm:"precision:3"`
Birthday time.Time `gorm:"precision:3"`
NameIgnoreMigration string `gorm:"size:128;-:migration"`
}
if err := DB.Table("user_migrate_columns").AutoMigrate(&UserMigrateColumn3{}); err != nil {
@ -124,6 +126,10 @@ func TestSmartMigrateColumn(t *testing.T) {
if precision, _, _ := columnType.DecimalSize(); (fullSupported || precision != 0) && precision != 3 {
t.Fatalf("birthday's precision should be 2, but got %v", precision)
}
case "name_ignore_migration":
if length, _ := columnType.Length(); (fullSupported || length != 0) && length != 100 {
t.Fatalf("name_ignore_migration's length should still be 100 but got %v", length)
}
}
}