我想让单个结构与多个结构一起工作。
在下面的代码中,第一个查询(rows
)应该是单个结构,因为它返回单行,而第二个查询(anotherquery
)应该是多个结构,因为它返回5行。
目前,我可以做的是rows
& anotherquery
为多个结构。
以下是server.go
:
package main
import (
"database/sql"
"github.com/labstack/echo"
_ "github.com/lib/pq"
"html/template"
"io"
"log"
"net/http"
)
type Gallery struct {
Title, Content string
}
type Idcontainer struct {
Stitle, Suri string
}
func main() {
e := echo.New()
e.Get("/post/:uritext", func(c *echo.Context) error {
rows, err := db.Query("SELECT title, content FROM gallery WHERE uri=$1", c.Param("uritext"))
anotherquery, err := db.Query("SELECT title AS stitle, uri AS suri FROM archive WHERE uri!=$1 LIMIT 5", c.Param("uritext"))
gallery := []Gallery{}
idcontainer := []Idcontainer{}
for rows.Next() {
g := Gallery{}
err := rows.Scan(&g.Title, &g.Content)
gallery = append(gallery, g)
}
for anotherquery.Next() {
g := Idcontainer{}
err := anotherquery.Scan(&g.Stitle, &g.Suri)
idcontainer = append(idcontainer, g)
}
type Model struct {
Galleries []Gallery
Idcontainers []Idcontainer
}
return c.Render(http.StatusOK, "onlytestingtpl", Model{
Galleries: gallery,
Idcontainers: idcontainer,
})
})
e.Run(":4444")
}
模板:
{{define "onlytestingtpl"}}
{{.Title}}<br>
{{.Content}}
<h1>ID number:</h1>
{{range .Idcontainers}}
<a href='{{.Suri}}'>{{.Stitle}}</a>
{{end}}
{{end}}
答案 0 :(得分:1)
我认为对您的代码进行最小程度的更改将是以下内容。
改变这个:
type Model struct {
Galleries []Gallery
Idcontainers []Idcontainer
}
return c.Render(http.StatusOK, "onlytestingtpl", Model{
Galleries: gallery,
Idcontainers: idcontainer,
})
对此:
type Model struct {
Gallery Gallery // you said that theres only a single gallery right?
Idcontainers []Idcontainer
}
return c.Render(http.StatusOK, "onlytestingtpl", Model{
Gallery: gallery[0],
Idcontainers: idcontainer,
})
然后将模板更改为:
{{define "onlytestingtpl"}}
{{.Gallery.Title}}<br>
{{.Gallery.Content}}
<h1>ID number:</h1>
{{range .Idcontainers}}
<a href='{{.Suri}}'>{{.Stitle}}</a>
{{end}}
{{end}}
我试图在这里模拟一个简单的例子:http://play.golang.org/p/uedcjXalEH
虽然你没有要求对整体代码提出反馈意见,但我还是冒险添加一些额外的评论:
考虑将您的初始rows
更改为以下内容:
gallery := Gallery{}
if !rows.Next() {
return rows.Err()
}
err := rows.Scan(&gallery.Title, &gallery.Content)
// anotherquery remains the same ...
return c.Render(http.StatusOK, "onlytestingtpl", Model{
Gallery: gallery,
Idcontainers: idcontainer,
})
希望这有帮助。