内容简介:package products import ( "erp/models" "github.com/astaxie/beego/orm" ) type Product_Inventorys struct { Id int64 Name string Formate string Unit string Warehouse string C_name string Purchase string Price string Quantity string } func init() { orm.Registe
多表查询的问题,mysql查询有数据,编写models的时候没传数据(数量是有传值,其他参数没有传值)(models联表查询创建,数据库没有表),各位大神请教下
zhong ·· 2 次点击 ··开始浏览package products import ( "erp/models" "github.com/astaxie/beego/orm" ) type Product_Inventorys struct { Id int64 Name string Formate string Unit string Warehouse string C_name string Purchase string Price string Quantity string } func init() { orm.RegisterModel(new(Product_Inventory)) } //统计仓库存量 func ListInvent()(num int64,err error, invent []Product_Inventorys) { qb, _ := orm.NewQueryBuilder("mysql") qb.Select("i.id As Id", "p.name As Name", " p.format As Formate", "p.unit As Unit","w.w_name As Warehouse","c.name As C_name","p.purchase As Purchase", "p.sales As Price","i.quantity As Quantity"). From(models.TableName("product_inventory i,pms_product p,pms_product_category c,pms_product_warehouse w") ). Where("i.product=p.id and i.warehouse=w.w_id and p.c_id=c.id") sql := qb.String() o := orm.NewOrm() var invents []Product_Inventorys nums, errs := o.Raw(sql).QueryRows(&invents) return nums,errs,invents } [ORM]2019/01/15 20:08:17 -[Queries/default] - [ OK / db.Query / 233.0ms] - [SELECT i.id As Id, p.name As Name, p.format As Formate, p.unit As Unit, w.w_name As Warehouse, c.name As C_name, p.purchase As Purchase, p.sales As Price, i.quantity As Quantity FROM pms_product_inventory i,pms_product p,pms_product_category c,pms_product_warehouse w WHERE i.product=p.id and i.warehouse=w.w_id and p.c_id=c.id] [{0 } {0 } {0 } {0 } {0 } {0 } {0 } {0 } {0 } {0 } {0 }]  
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Designing Data-Intensive Applications
Martin Kleppmann / O'Reilly Media / 2017-4-2 / USD 44.99
Data is at the center of many challenges in system design today. Difficult issues need to be figured out, such as scalability, consistency, reliability, efficiency, and maintainability. In addition, w......一起来看看 《Designing Data-Intensive Applications》 这本书的介绍吧!