cas_tt_cloud_backend/app/api/admin/model/activity_instance.go

package model

import (
	"SciencesServer/app/common/model"
	"SciencesServer/serve/orm"
	"fmt"
)

type ActivityInstance struct {
	*model.ActivityInstance
}

type ActivityInstanceInfo struct {
	*model.ActivityInstance
	JoinCount int `json:"join_count"`
	model.Area
}

// Activity 活动信息
func (m *ActivityInstance) Activity(page, pageSize int, count *int64, where ...*model.ModelWhere) ([]*ActivityInstanceInfo, error) {
	db := orm.GetDB().Table(m.TableName()+" AS a").
		Select("a.id", "a.tenant_id", "a.image", "a.title", "a.contact", "a.industry", "a.contact_mobile", "a.begin_at",
			"a.finish_at", "a.join_deadline", "a.amount", "a.max_number", "a.status", "a.created_at", "j.count AS join_count",
			"t.province", "t.city").
		Joins(fmt.Sprintf("LEFT JOIN (SELECT activity_id, COUNT(id) AS count FROM %s WHERE is_deleted = %d AND status = %d GROUP BY activity_id) AS j ON a.id = j.activity_id",
			model.NewActivityJoin().TableName(), model.DeleteStatusForNot, model.ActivityJoinStatusForSuccess)).
		Joins(fmt.Sprintf("LEFT JOIN %s AS t ON a.tenant_id = t.id", model.NewSysTenant().TableName())).
		Where("a.is_deleted = ?", model.DeleteStatusForNot)

	if len(where) > 0 {
		for _, wo := range where {
			db = db.Where(wo.Condition, wo.Value)
		}
	}
	out := make([]*ActivityInstanceInfo, 0)

	if err := db.Count(count).Error; err != nil {
		return nil, err
	}
	if err := db.Order("a.id " + model.OrderModeToDesc).Offset((page - 1) * pageSize).Limit(pageSize).Scan(&out).Error; err != nil {
		return nil, err
	}
	return out, nil
}

func NewActivityInstance() *ActivityInstance {
	return &ActivityInstance{model.NewActivityInstance()}
}