So i have this query and currently collects all the data with materialName
equals to gold. I wanted change all to false.
// materialName = "gold" for example
database.ref('/app/posts').orderByChild('material').startAt(materialName).endAt(materialName).once('value', function (snapshot) {
const materials = snapshot.val();
})
I have tried something like this:
database.ref('/app/posts').orderByChild('material').startAt(materialName).endAt(materialName).once('value', function (snapshot) {
database.ref('/app/posts').update({material: false});
})
also I have tried this:
const newData = Object.assign({}, materials, {material: false});
// but this updates outside of the post, result will be:
"posts" : {
"material": false,
"post-1503586" : {
"title": "sample title",
"material" : "gold"
},
"post-9172991" : {
"title": "sample title",
"material" : "silver"
}
}
sample json:
"posts" : {
"post-1503586" : {
"title": "sample title",
"material" : "gold"
},
"post-9172991" : {
"title": "sample title",
"material" : "silver"
}
}
You need to loop over the results (since there can be multiple matching nodes) and then update each:
database.ref('/app/posts')
.orderByChild('material')
.equalTo(materialName)
.once('value', function (snapshot) {
snapshot.forEach(function(child) {
child.ref.update({material: false});
});
});
You'll also note that I changed your .startAt().endAt()
to an equalTo()
, which gives the same results with less code.
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