feat：完善活动信息

app/api/enterprise/model/activity_instance.go

@@ -0,0 +1,47 @@
+package model
+
+import (
+	"SciencesServer/app/common/model"
+	"SciencesServer/serve/orm"
+	"fmt"
+	"time"
+)
+
+type ActivityInstance struct {
+	*model.ActivityInstance
+}
+
+// ActivityInstanceJoinInfo 活动报名信息
+type ActivityInstanceJoinInfo struct {
+	ID uint64 `json:"id"`
+	*model.ActivityInstanceBasic
+	CreatedAt time.Time `json:"created_at"`
+}
+
+// Joins 活动参加信息
+func (m *ActivityInstance) Joins(page, pageSize int, count *int64, where ...*model.ModelWhere) ([]*ActivityInstanceJoinInfo, error) {
+	db := orm.GetDB().Table(model.NewActivityJoin().TableName()+" AS j").
+		Select("j.id", "a.title", "a.begin_at", "a.finish_at", "a.join_deadline", "j.created_at").
+		Joins(fmt.Sprintf("LEFT JOIN %s AS a ON j.activity_id = a.id", m.TableName())).
+		Where("j.is_deleted = ?", model.DeleteStatusForNot).
+		Where("j.status = ?", model.ActivityJoinStatusForSuccess)
+
+	if len(where) > 0 {
+		for _, v := range where {
+			db = db.Where(v.Condition, v.Value)
+		}
+	}
+	out := make([]*ActivityInstanceJoinInfo, 0)
+
+	if err := db.Count(count).Error; err != nil {
+		return nil, err
+	}
+	if err := db.Order("j.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()}
+}