/
maplayer.go
182 lines (166 loc) · 4.94 KB
/
maplayer.go
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package models
import (
"errors"
"fmt"
"reflect"
"strings"
"github.com/astaxie/beego/orm"
"github.com/astaxie/beego"
"time"
)
type MapLayer struct {
Id int64 `orm:"pk;auto;column(id)" json:"id"`
Name string `orm:"" json:"name"`
Status string `orm:"" json:"status"`
Description string `orm:"" json:"description"`
Weight int64 `orm:"" json:"weight"`
Map *Map `orm:"rel(fk)" json:"map"`
Elements []*MapElement `orm:"reverse(many)" json:"elements"`
Created_at time.Time `orm:"auto_now_add;type(datetime);column(created_at)" json:"created_at"`
Update_at time.Time `orm:"auto_now;type(datetime);column(update_at)" json:"update_at"`
}
type SortMapLayersByWeight []*MapLayer
func (m *MapLayer) TableName() string {
return beego.AppConfig.String("db_map_layers")
}
func init() {
orm.RegisterModel(new(MapLayer))
}
func (l SortMapLayersByWeight) Len() int { return len(l) }
func (l SortMapLayersByWeight) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
func (l SortMapLayersByWeight) Less(i, j int) bool { return l[i].Weight < l[j].Weight }
// AddMapLayer insert a new MapLayer into database and returns
// last inserted Id on success.
func AddMapLayer(m *MapLayer) (id int64, err error) {
o := orm.NewOrm()
id, err = o.Insert(m)
return
}
// GetMapLayerById retrieves MapLayer by Id. Returns error if
// Id doesn't exist
func GetMapLayerById(id int64) (v *MapLayer, err error) {
o := orm.NewOrm()
v = &MapLayer{Id: id}
if err = o.Read(v); err == nil {
return v, nil
}
return nil, err
}
// GetAllMapLayer retrieves all MapLayer matches certain condition. Returns empty list if
// no records exist
func GetAllMapLayer(query map[string]string, fields []string, sortby []string, order []string,
offset int64, limit int64) (ml []interface{}, meta *map[string]int64, err error) {
o := orm.NewOrm()
qs := o.QueryTable(new(MapLayer))
// query k=v
for k, v := range query {
// rewrite dot-notation to Object__Attribute
k = strings.Replace(k, ".", "__", -1)
qs = qs.Filter(k, v)
}
// order by:
var sortFields []string
if len(sortby) != 0 {
if len(sortby) == len(order) {
// 1) for each sort field, there is an associated order
for i, v := range sortby {
orderby := ""
if order[i] == "desc" {
orderby = "-" + v
} else if order[i] == "asc" {
orderby = v
} else {
return nil, nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
}
sortFields = append(sortFields, orderby)
}
qs = qs.OrderBy(sortFields...)
} else if len(sortby) != len(order) && len(order) == 1 {
// 2) there is exactly one order, all the sorted fields will be sorted by this order
for _, v := range sortby {
orderby := ""
if order[0] == "desc" {
orderby = "-" + v
} else if order[0] == "asc" {
orderby = v
} else {
return nil, nil, errors.New("Error: Invalid order. Must be either [asc|desc]")
}
sortFields = append(sortFields, orderby)
}
} else if len(sortby) != len(order) && len(order) != 1 {
return nil, nil, errors.New("Error: 'sortby', 'order' sizes mismatch or 'order' size is not 1")
}
} else {
if len(order) != 0 {
return nil, nil, errors.New("Error: unused 'order' fields")
}
}
var l []MapLayer
qs = qs.OrderBy(sortFields...)
objects_count, err := qs.Count()
if err != nil {
return
}
if _, err = qs.Limit(limit, offset).All(&l, fields...); err == nil {
if len(fields) == 0 {
for _, v := range l {
ml = append(ml, v)
}
} else {
// trim unused fields
for _, v := range l {
m := make(map[string]interface{})
val := reflect.ValueOf(v)
for _, fname := range fields {
m[fname] = val.FieldByName(fname).Interface()
}
ml = append(ml, m)
}
}
meta = &map[string]int64{
"objects_count": objects_count,
"limit": limit,
"offset": offset,
}
return ml, meta, nil
}
return nil, nil, err
}
// UpdateMapLayer updates MapLayer by Id and returns error if
// the record to be updated doesn't exist
func UpdateMapLayerById(m *MapLayer) (err error) {
o := orm.NewOrm()
v := MapLayer{Id: m.Id}
// ascertain id exists in the database
if err = o.Read(&v); err == nil {
var num int64
if num, err = o.Update(m, "Name", "Status", "Description", "Weight", "Map", "Elements"); err == nil {
fmt.Println("Number of records updated in database:", num)
}
}
return
}
// DeleteMapLayer deletes MapLayer by Id and returns error if
// the record to be deleted doesn't exist
func DeleteMapLayer(id int64) (err error) {
o := orm.NewOrm()
v := MapLayer{Id: id}
// ascertain id exists in the database
if err = o.Read(&v); err == nil {
var num int64
if num, err = o.Delete(&MapLayer{Id: id}); err == nil {
fmt.Println("Number of records deleted in database:", num)
}
}
return
}
func SortMapLayers(m []*MapLayer) (err error) {
o := orm.NewOrm()
for _, l := range m {
o.QueryTable(&MapLayer{}).Filter("Id", l.Id).Update(orm.Params{
"weight": l.Weight,
})
}
return
}