优化代码结构，修复查询逻辑，添加构建脚本

actions/cities.go

@@ -2,8 +2,9 @@ package actions
 
 import (
 	"fmt"
-	"gorm.io/gorm"
 	"zzman/model"
+
+	"gorm.io/gorm"
 )
 
 func FindCities(tx *gorm.DB) ([]model.City, error) {
@@ -15,15 +16,24 @@ func FindCities(tx *gorm.DB) ([]model.City, error) {
 }
 
 func FindCitiesWithEdgesCount(tx *gorm.DB) ([]model.City, error) {
-	var cities []model.City
+	var datas []struct {
+		model.City
+		EdgesCount int `gorm:"column:edges_count"`
+	}
 	err := tx.Debug().
-		Select("cities.*, COUNT(edges.id) AS edges_count").
-		Joins("LEFT JOIN edges ON edges.city_id = cities.id").
-		Group("cities.id").
-		Find(&cities).Error
+		Select("cityhash.*, COUNT(edge.id) AS edges_count").
+		Joins("LEFT JOIN edge ON edge.city_id = cityhash.id").
+		Where("cityhash.label IS NOT NULL").
+		Group("cityhash.id").
+		Find(&datas).Error
 	if err != nil {
 		return nil, fmt.Errorf("failed to find cities with edges count: %w", err)
 	}
+	var cities = make([]model.City, len(datas))
+	for i, data := range datas {
+		cities[i] = data.City
+		cities[i].EdgesCount = data.EdgesCount
+	}
 	return cities, nil
 }