forked from coocood/qbs
/
sqlite3.go
132 lines (124 loc) · 3.24 KB
/
sqlite3.go
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package qbs
import (
"reflect"
"time"
"unsafe"
)
type sqlite3 struct {
base
}
func NewSqlite3() Dialect {
d := new(sqlite3)
d.base.dialect = d
return d
}
func (d sqlite3) sqlType(f interface{}, size int) string {
switch f.(type) {
case bool:
return "integer"
case int, int8, int16, int32, uint, uint8, uint16, uint32, int64, uint64:
return "integer"
case float32, float64:
return "real"
case []byte:
return "text"
case string:
return "text"
case time.Time:
return "text"
}
panic("invalid sql type")
}
func (d sqlite3) setModelValue(value reflect.Value, field reflect.Value) error {
switch field.Type().Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
field.SetInt(value.Elem().Int())
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
// reading uint from int value causes panic
switch value.Elem().Kind() {
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
field.SetUint(uint64(value.Elem().Int()))
default:
field.SetUint(value.Elem().Uint())
}
case reflect.Bool:
if value.Elem().Int() == 0 {
field.SetBool(false)
} else {
field.SetBool(true)
}
case reflect.Float32, reflect.Float64:
field.SetFloat(value.Elem().Float())
case reflect.String:
field.SetString(value.Elem().String())
case reflect.Slice:
if reflect.TypeOf(value.Interface()).Elem().Kind() == reflect.Uint8 {
field.SetBytes(value.Elem().Bytes())
}
case reflect.Struct:
if _, ok := field.Interface().(time.Time); ok {
var t time.Time
var err error
switch value.Elem().Kind() {
case reflect.String:
t, err = time.Parse("2006-01-02 15:04:05", value.Elem().String())
if err != nil {
return err
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
t = time.Unix(value.Elem().Int(), 0)
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
t = time.Unix(int64(value.Elem().Uint()), 0)
}
v := reflect.NewAt(reflect.TypeOf(time.Time{}), unsafe.Pointer(&t))
field.Set(v.Elem())
}
}
return nil
}
func (d sqlite3) indexExists(mg *Migration, tableName string, indexName string) bool {
query := "PRAGMA index_list('" + tableName + "')"
rows, err := mg.db.Query(query)
if err != nil {
panic(err)
}
defer rows.Close()
for rows.Next() {
var c0, c1, c2 string
rows.Scan(&c0, &c1, &c2)
if c1 == indexName {
return true
}
}
return false
}
func (d sqlite3) columnsInTable(mg *Migration, table interface{}) map[string]bool {
tn := tableName(table)
columns := make(map[string]bool)
query := "PRAGMA table_info('" + tn + "')"
rows, err := mg.db.Query(query)
if err != nil {
panic(err)
}
defer rows.Close()
for rows.Next() {
cols, _ := rows.Columns()
containers := make([]interface{}, 0, len(cols))
for i := 0; i < cap(containers); i++ {
var v interface{}
containers = append(containers, &v)
}
err = rows.Scan(containers...)
value := reflect.Indirect(reflect.ValueOf(containers[1]))
if err == nil {
columns[value.Elem().String()] = true
}
}
return columns
}
func (d sqlite3) primaryKeySql(isString bool, size int) string {
if isString {
return "text PRIMARY KEY NOT NULL"
}
return "integer PRIMARY KEY AUTOINCREMENT NOT NULL"
}