如何使用
JavaScript存储Firebase数据库中的数据。我想使用 once 方法,这样它就不会经常查找任何更改。例如像这样:
database.child('readOnly/something').once('value').then((snap) => {
const groupObj = [
snap.val()
]
});
app.get('/something',(req,res)=>{
res.render('something',{
"groupList": groupObj
});
});
// Individual Life Groups
app.get('/something/:name',(req,res)=>{
const group = req.path.split("/").pop();
console.log(groupObj.length)
for (i = 0; i < groupObj.length; i+=1) {
if(groupObj[i].url == group){
var desiredGroup = groupObj[i];
console.log(desiredGroup);
break;
}
}
res.render('group', desiredGroup);
// To-Do: Add Data and Bindings
});
我正在使用最新版本的expressjs,firebase,nodejs和npm。
您可以将
groupObj
变量放在"全局"区域中,以便所有回调都可以使用它。
const groupObj = [];
database.child('readOnly/something').once('value').then((snap) => {
groupObj.push(snap.val());
});
app.get('/something',(req,res)=>{
res.render('something',{
"groupList": groupObj
});
});
// Individual Life Groups
app.get('/something/:name',(req,res)=>{
const group = req.path.split("/").pop();
console.log(groupObj.length)
for (i = 0; i < groupObj.length; i+=1) {
if(groupObj[i].url == group){
var desiredGroup = groupObj[i];
console.log(desiredGroup);
break;
}
}
res.render('group', desiredGroup);
// To-Do: Add Data and Bindings
});