Firebase query array or objects with Javascript
I've been struggling with creating a firebase query all day!
The below query returns the data as an array from my Firebase realtime database:
exports.getCountry = () => {
return database
.ref("/countries")
.once("value")
.then(data => data.val());
};
This returns the below from the database in the format Array of Objects,
[
{"id":1, "country":"singapore", "population":15000000},
{"id":2, "country":"hongkong", "population":12000000},
{"id":2, "country":"vietnam", "population":2250000}
]
However I want to query the database to just return one record, something along the lines of
exports.getCountry = () => {
return database
.ref("/countries")
.where('id'===1)
.once("value")
.then(data => data.val());
};
would return a single line from my database:
{"id":1, "country":"singapore", "population":15000000}
however I can't get this to work! It should be simple, but I can't get it to play ball!
javascript database firebase firebase-realtime-database
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
add a comment |
I've been struggling with creating a firebase query all day!
The below query returns the data as an array from my Firebase realtime database:
exports.getCountry = () => {
return database
.ref("/countries")
.once("value")
.then(data => data.val());
};
This returns the below from the database in the format Array of Objects,
[
{"id":1, "country":"singapore", "population":15000000},
{"id":2, "country":"hongkong", "population":12000000},
{"id":2, "country":"vietnam", "population":2250000}
]
However I want to query the database to just return one record, something along the lines of
exports.getCountry = () => {
return database
.ref("/countries")
.where('id'===1)
.once("value")
.then(data => data.val());
};
would return a single line from my database:
{"id":1, "country":"singapore", "population":15000000}
however I can't get this to work! It should be simple, but I can't get it to play ball!
javascript database firebase firebase-realtime-database
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
add a comment |
I've been struggling with creating a firebase query all day!
The below query returns the data as an array from my Firebase realtime database:
exports.getCountry = () => {
return database
.ref("/countries")
.once("value")
.then(data => data.val());
};
This returns the below from the database in the format Array of Objects,
[
{"id":1, "country":"singapore", "population":15000000},
{"id":2, "country":"hongkong", "population":12000000},
{"id":2, "country":"vietnam", "population":2250000}
]
However I want to query the database to just return one record, something along the lines of
exports.getCountry = () => {
return database
.ref("/countries")
.where('id'===1)
.once("value")
.then(data => data.val());
};
would return a single line from my database:
{"id":1, "country":"singapore", "population":15000000}
however I can't get this to work! It should be simple, but I can't get it to play ball!
javascript database firebase firebase-realtime-database
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
I've been struggling with creating a firebase query all day!
The below query returns the data as an array from my Firebase realtime database:
exports.getCountry = () => {
return database
.ref("/countries")
.once("value")
.then(data => data.val());
};
This returns the below from the database in the format Array of Objects,
[
{"id":1, "country":"singapore", "population":15000000},
{"id":2, "country":"hongkong", "population":12000000},
{"id":2, "country":"vietnam", "population":2250000}
]
However I want to query the database to just return one record, something along the lines of
exports.getCountry = () => {
return database
.ref("/countries")
.where('id'===1)
.once("value")
.then(data => data.val());
};
would return a single line from my database:
{"id":1, "country":"singapore", "population":15000000}
however I can't get this to work! It should be simple, but I can't get it to play ball!
javascript database firebase firebase-realtime-database
javascript database firebase firebase-realtime-database
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
asked Nov 21 '18 at 17:29
dtwoodtwoo
1007
1007
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
I referenced these Firebase docs on complex queries.
Piecing together the examples they provide, I think your query should look something like:
var ref = db.ref("countries");
ref.orderByChild("id").equalTo(1).on("value", function(snapshot) {
snapshot.forEach( data => {
console.log(data.val());
});
});
*untested
EDIT:
The docs I linked are to the admin SDK, if you are doing this on the front end with JavaScript, it should still work. The JavaScript SDK appears to have the same query structure - shown in these docs for the JS SDK too.
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I referenced these Firebase docs on complex queries.
Piecing together the examples they provide, I think your query should look something like:
var ref = db.ref("countries");
ref.orderByChild("id").equalTo(1).on("value", function(snapshot) {
snapshot.forEach( data => {
console.log(data.val());
});
});
*untested
EDIT:
The docs I linked are to the admin SDK, if you are doing this on the front end with JavaScript, it should still work. The JavaScript SDK appears to have the same query structure - shown in these docs for the JS SDK too.
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
add a comment |
I referenced these Firebase docs on complex queries.
Piecing together the examples they provide, I think your query should look something like:
var ref = db.ref("countries");
ref.orderByChild("id").equalTo(1).on("value", function(snapshot) {
snapshot.forEach( data => {
console.log(data.val());
});
});
*untested
EDIT:
The docs I linked are to the admin SDK, if you are doing this on the front end with JavaScript, it should still work. The JavaScript SDK appears to have the same query structure - shown in these docs for the JS SDK too.
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
add a comment |
I referenced these Firebase docs on complex queries.
Piecing together the examples they provide, I think your query should look something like:
var ref = db.ref("countries");
ref.orderByChild("id").equalTo(1).on("value", function(snapshot) {
snapshot.forEach( data => {
console.log(data.val());
});
});
*untested
EDIT:
The docs I linked are to the admin SDK, if you are doing this on the front end with JavaScript, it should still work. The JavaScript SDK appears to have the same query structure - shown in these docs for the JS SDK too.
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
I referenced these Firebase docs on complex queries.
Piecing together the examples they provide, I think your query should look something like:
var ref = db.ref("countries");
ref.orderByChild("id").equalTo(1).on("value", function(snapshot) {
snapshot.forEach( data => {
console.log(data.val());
});
});
*untested
EDIT:
The docs I linked are to the admin SDK, if you are doing this on the front end with JavaScript, it should still work. The JavaScript SDK appears to have the same query structure - shown in these docs for the JS SDK too.
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
answered Nov 21 '18 at 18:07
JeremyWJeremyW
2,098716
2,098716
add a comment |
add a comment |
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