update

db_ex.go

@@ -172,6 +172,29 @@ func (c *Compounds) Reset() {
 	*c = (*c)[0:0]
 }
 
+func (c *Compounds) Delete(keys ...interface{}) {
+	for _, key := range keys {
+		for i, v := range *c {
+			r, y := v.(Cond)
+			if !y {
+				continue
+			}
+			_, ok := r[key]
+			if !ok {
+				continue
+			}
+			delete(r, key)
+			if len(r) == 0 {
+				if i == 0 {
+					*c = (*c)[i+1:]
+				} else {
+					*c = append((*c)[0:i-1], (*c)[i+1:]...)
+				}
+			}
+		}
+	}
+}
+
 type TableName interface {
 	TableName() string
 }

db_ex_test.go

@@ -0,0 +1,41 @@
+package db
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCompounds(t *testing.T) {
+	c := NewCompounds()
+	c.AddKV(`name_a`, `value_a`)
+	c.AddKV(`name_b`, `value_b`)
+	c.AddKV(`name_c`, `value_c`)
+	c.AddKV(`name_d`, `value_d`)
+	c.AddKV(`name_e`, `value_e`)
+	c.AddKV(`name_f`, `value_f`)
+	c.Delete(`name_a`, `name_b`, `name_c`)
+	data := map[string]interface{}{}
+	for _, _v := range c.Slice() {
+		cd := _v.(Cond)
+		for k, v := range cd {
+			data[fmt.Sprint(k)] = v
+		}
+	}
+	assert.Equal(t, map[string]interface{}{
+		"name_d": "value_d",
+		"name_e": "value_e",
+		"name_f": "value_f",
+	}, data)
+	c.Delete(`name_c`, `name_d`, `name_e`, `name_f`)
+	data = map[string]interface{}{}
+	for _, _v := range c.Slice() {
+		cd := _v.(Cond)
+		for k, v := range cd {
+			data[fmt.Sprint(k)] = v
+		}
+	}
+	assert.Equal(t, map[string]interface{}{}, data)
+	assert.Equal(t, 0, c.Size())
+}