package gorm import ( "database/sql" "database/sql/driver" "encoding/json" "reflect" "gorm.io/gorm/clause" "gorm.io/gorm/schema" ) type DeletedAt sql.NullTime // Scan implements the Scanner interface. func (n *DeletedAt) Scan(value interface{}) error { return (*sql.NullTime)(n).Scan(value) } // Value implements the driver Valuer interface. func (n DeletedAt) Value() (driver.Value, error) { if !n.Valid { return nil, nil } return n.Time, nil } func (n DeletedAt) MarshalJSON() ([]byte, error) { if n.Valid { return json.Marshal(n.Time) } return json.Marshal(nil) } func (n *DeletedAt) UnmarshalJSON(b []byte) error { if string(b) == "null" { n.Valid = false return nil } err := json.Unmarshal(b, &n.Time) if err == nil { n.Valid = true } return err } func (DeletedAt) QueryClauses(f *schema.Field) []clause.Interface { return []clause.Interface{SoftDeleteQueryClause{Field: f}} } type SoftDeleteQueryClause struct { Field *schema.Field } func (sd SoftDeleteQueryClause) Name() string { return "" } func (sd SoftDeleteQueryClause) Build(clause.Builder) { } func (sd SoftDeleteQueryClause) MergeClause(*clause.Clause) { } func (sd SoftDeleteQueryClause) ModifyStatement(stmt *Statement) { if _, ok := stmt.Clauses["soft_delete_enabled"]; !ok && !stmt.Statement.Unscoped { if c, ok := stmt.Clauses["WHERE"]; ok { if where, ok := c.Expression.(clause.Where); ok && len(where.Exprs) >= 1 { for _, expr := range where.Exprs { if orCond, ok := expr.(clause.OrConditions); ok && len(orCond.Exprs) == 1 { where.Exprs = []clause.Expression{clause.And(where.Exprs...)} c.Expression = where stmt.Clauses["WHERE"] = c break } } } } stmt.AddClause(clause.Where{Exprs: []clause.Expression{ clause.Eq{Column: clause.Column{Table: clause.CurrentTable, Name: sd.Field.DBName}, Value: nil}, }}) stmt.Clauses["soft_delete_enabled"] = clause.Clause{} } } func (DeletedAt) UpdateClauses(f *schema.Field) []clause.Interface { return []clause.Interface{SoftDeleteUpdateClause{Field: f}} } type SoftDeleteUpdateClause struct { Field *schema.Field } func (sd SoftDeleteUpdateClause) Name() string { return "" } func (sd SoftDeleteUpdateClause) Build(clause.Builder) { } func (sd SoftDeleteUpdateClause) MergeClause(*clause.Clause) { } func (sd SoftDeleteUpdateClause) ModifyStatement(stmt *Statement) { if stmt.SQL.Len() == 0 && !stmt.Statement.Unscoped { SoftDeleteQueryClause(sd).ModifyStatement(stmt) } } func (DeletedAt) DeleteClauses(f *schema.Field) []clause.Interface { return []clause.Interface{SoftDeleteDeleteClause{Field: f}} } type SoftDeleteDeleteClause struct { Field *schema.Field } func (sd SoftDeleteDeleteClause) Name() string { return "" } func (sd SoftDeleteDeleteClause) Build(clause.Builder) { } func (sd SoftDeleteDeleteClause) MergeClause(*clause.Clause) { } func (sd SoftDeleteDeleteClause) ModifyStatement(stmt *Statement) { if stmt.SQL.Len() == 0 && !stmt.Statement.Unscoped { curTime := stmt.DB.NowFunc() stmt.AddClause(clause.Set{{Column: clause.Column{Name: sd.Field.DBName}, Value: curTime}}) stmt.SetColumn(sd.Field.DBName, curTime, true) if stmt.Schema != nil { _, queryValues := schema.GetIdentityFieldValuesMap(stmt.Context, stmt.ReflectValue, stmt.Schema.PrimaryFields) column, values := schema.ToQueryValues(stmt.Table, stmt.Schema.PrimaryFieldDBNames, queryValues) if len(values) > 0 { stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.IN{Column: column, Values: values}}}) } if stmt.ReflectValue.CanAddr() && stmt.Dest != stmt.Model && stmt.Model != nil { _, queryValues = schema.GetIdentityFieldValuesMap(stmt.Context, reflect.ValueOf(stmt.Model), stmt.Schema.PrimaryFields) column, values = schema.ToQueryValues(stmt.Table, stmt.Schema.PrimaryFieldDBNames, queryValues) if len(values) > 0 { stmt.AddClause(clause.Where{Exprs: []clause.Expression{clause.IN{Column: column, Values: values}}}) } } } SoftDeleteQueryClause(sd).ModifyStatement(stmt) stmt.AddClauseIfNotExists(clause.Update{}) stmt.Build(stmt.DB.Callback().Update().Clauses...) } }