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filter.go
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/
filter.go
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package decoder
import (
"github.com/gin-gonic/gin"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/primitive"
"strings"
)
// MakeFilter fields
// name=>rename
func MakeFilter(c *gin.Context, fields []string) interface{} {
queryPath := c.Request.URL.RawQuery
f := &UrlQuery{}
err := f.Load(queryPath)
if err != nil {
return nil
}
filterFields := make([]string, 0)
for _, i := range fields {
s := strings.Split(i, "=>")
if len(s) == 2 {
filterFields = append(filterFields, s[0])
f = f.Translate(s[0], s[1])
} else {
filterFields = append(filterFields, i)
}
}
filterMap := f.ExtractFilterAsKey2Map()
if len(filterMap) == 0 {
return nil
}
filters := f.AsMongoFilter(fields, filterMap[0])
filterInSlice := f.ExtractFilterAsKey2Map()
if len(filterInSlice) > 0 {
ofOneItem := filterInSlice[0]
targetIdList, ok := ofOneItem["id"]
if !ok {
return nil
}
return ToMany(targetIdList)
}
return filters
}
func ToMany(v interface{}) bson.M {
aInterface := v.([]interface{})
aString := make([]string, len(aInterface))
for i, v := range aInterface {
aString[i] = v.(string)
}
// 统一转换所有引用的id
objIds := make([]*primitive.ObjectID, 0)
for _, i := range aString {
objID, _ := primitive.ObjectIDFromHex(i)
objIds = append(objIds, &objID)
}
return bson.M{
"_id": bson.M{"$in": objIds},
}
}