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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MATLAB数值计算
莫勒 / 喻文健 / 机械工业出版社 / 2006-6 / 35.00元
《MATLAB数值计算》是关于数值方法、MATLAB软件和工程计算的教材,着重介绍数学软件的熟练使用及其内在的高效率算法。主要内容包括:MATLAB介绍、线性方程组、插值、方程求根、最小二乘法、数值积分、常微分方程、傅里叶分析、随机数、特征值与奇异值、偏微分方程。《MATLAB数值计算》配备大量MATLAB例子源代码及习题,其中涉及密码学、Google网页分级、大气科学和图像处理等前沿问题,可以帮......一起来看看 《MATLAB数值计算》 这本书的介绍吧!