[英]Gatsby: Get all images with GraphQL query from a path stored in a json
[英]JSON in Gatsby with GraphQL
我有一個名為 Test.json 的 JSON 文件,其中包含所有數據。
[ { "name" : "Margo",
"birthDate": "1990.03.15",
"timetable": [
{"time": "8.00",
"task": "toDoMargoElem1"},
{"time": "9.00",
"task": "toDoMargoElem2"}
},
{ "name" : "Arthur",
"birthDate": "1990.03.15",
"timetable": [
{"time": "8.00",
"task": "toDoArthurElem1"},
{"time": "9.00",
"task": "toDoArthurElem2"}
}
}
我想使用來自組件的調用數據,所以我嘗試調用 GraphiQL。 代碼導出器給了我
const ComponentName = () => {
const data = useStaticQuery(graphql`
{
allTestJson {
edges {
node {
name
timetable {
time
task
}
}
}
}
}
`)
return <pre>{JSON.stringify(data, null, 4)}</pre>
}
在我的組件 Mycomponent 中,我接下來做了
import React from 'react'
import {useStaticQuery, graphql} from 'gatsby'
export default function Sched() {
const data = useStaticQuery(graphql`
{
allTestJson {
edges {
node {
name
timetable {
time
task
}
}
}
}
}
`)
const results = data.allTestJson.edges.map (({node}) => {
const {name, time, task} = node;
return {
name,
time,
task
}
})
return (<div>
{results.map (({eventName, time, task})=>
<div key = {name}>
{name}
{time}
{task}
</div>
)}
</div>
)
}
但結果我看到的只是建築
<div> {name} </div>
<div> {name} </div>
我怎樣才能看到{時間,任務}? 為什么 map 不顯示我的對象的所有節點?
檢查 object 說明
const results = data.allTestJson.edges.map (({node}) => {
const {name, time, task} = node; // check here
const {name, timetable:{time, task}} = node; // this is an example of nested object destructing
return {
name,
time,
task
}
})
time
和task
在嵌套的 object timetable
內,因此生成的代碼應如下所示:
import React from 'react'
import {useStaticQuery, graphql} from 'gatsby'
export default function Sched() {
const data = useStaticQuery(graphql`
{
allTestJson {
edges {
node {
name
timetable {
time
task
}
}
}
}
}
`)
return data.allTestJson.edges.map (({node}) => {
const {name, timetable} = node;
return <div key = {name}>
{name}
{timetable.map(item=><div key={item.task}>{item.time},{item.task}</div>)}
</div>
})
}
未查詢birthday
字段(我想這是一個錯字),因此將其添加到正確的 position 中。
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