ent 提供了聚合处理

一个group by + 聚合的处理(age以及name字段)

package main
import (
    "context"
    "<project>/ent"
    "<project>/ent/user"
)
func Do(ctx context.Context, client *ent.Client) {
    var v []struct {
        Name string `json:"name"`
        Age int `json:"age"`
        Sum int `json:"sum"`
        Count int `json:"count"`
    }
    err := client.User.Query().
        GroupBy(user.FieldName, user.FieldAge).
        Aggregate(ent.Count(), ent.Sum(user.FieldAge)).
        Scan(ctx, &v)
}
 
 

group by 一个字段

package main
import (
    "context"
    "<project>/ent"
    "<project>/ent/user"
)
func Do(ctx context.Context, client *ent.Client) {
    names, err := client.User.
        Query().
        GroupBy(user.FieldName).
        Strings(ctx)
}
 
 

参考资料

https://entgo.io/docs/aggregate/

01-26 11:18