Firebase query dont display any data if data dont exist
Firebase query don't display any data if data don't exist no null no undefined , nothing no message at all , it only shows if it find something in the database.
const ref = this.fb.database().ref("Users");
var self = this;
ref.orderByChild('cellphone').equalTo('+351' + this.phoneNumber.toString()).on("child_added", (snapshot) => {
console.log(snapshot.val().cellphone);
if (snapshot.exists()){
let toast = self.toastCtrl.create({
message: 'Cellphone already exist',
duration: 2000,
position: 'bottom'
});
toast.present();
}
if(!snapshot.exists()){ // it dont even get here
console.log('can register');
}
});
My db structure, so if it does not find my cellphone does not shot nothing at all
javascript
firebase firebase-realtime-database angularfire2 edited Nov 20 '18 at 14:09
KENdi
5,7192821
asked Nov 20 '18 at 11:36
Kevin Dias
334213
add a comment |
Firebase query don't display any data if data don't exist no null no undefined , nothing no message at all , it only shows if it find something in the database.
const ref = this.fb.database().ref("Users");
var self = this;
ref.orderByChild('cellphone').equalTo('+351' + this.phoneNumber.toString()).on("child_added", (snapshot) => {
console.log(snapshot.val().cellphone);
if (snapshot.exists()){
let toast = self.toastCtrl.create({
message: 'Cellphone already exist',
duration: 2000,
position: 'bottom'
});
toast.present();
}
if(!snapshot.exists()){ // it dont even get here
console.log('can register');
}
});
My db structure, so if it does not find my cellphone does not shot nothing at all
javascript
firebase firebase-realtime-database angularfire2 edited Nov 20 '18 at 14:09
KENdi
5,7192821
asked Nov 20 '18 at 11:36
Kevin Dias
334213
1
Have you tried using "value" instead of "child_added" event? That is likely the issue here.
– Burhan B
Nov 20 '18 at 12:52
@BurhanB yep was the problem thanks sir
– Kevin Dias
Nov 20 '18 at 13:58
add a comment |
Firebase query don't display any data if data don't exist no null no undefined , nothing no message at all , it only shows if it find something in the database.
const ref = this.fb.database().ref("Users");
var self = this;
ref.orderByChild('cellphone').equalTo('+351' + this.phoneNumber.toString()).on("child_added", (snapshot) => {
console.log(snapshot.val().cellphone);
if (snapshot.exists()){
let toast = self.toastCtrl.create({
message: 'Cellphone already exist',
duration: 2000,
position: 'bottom'
});
toast.present();
}
if(!snapshot.exists()){ // it dont even get here
console.log('can register');
}
});
My db structure, so if it does not find my cellphone does not shot nothing at all
javascript
firebase firebase-realtime-database angularfire2 edited Nov 20 '18 at 14:09
KENdi
5,7192821
asked Nov 20 '18 at 11:36
Kevin Dias
334213
Firebase query don't display any data if data don't exist no null no undefined , nothing no message at all , it only shows if it find something in the database.
const ref = this.fb.database().ref("Users");
var self = this;
ref.orderByChild('cellphone').equalTo('+351' + this.phoneNumber.toString()).on("child_added", (snapshot) => {
console.log(snapshot.val().cellphone);
if (snapshot.exists()){
let toast = self.toastCtrl.create({
message: 'Cellphone already exist',
duration: 2000,
position: 'bottom'
});
toast.present();
}
if(!snapshot.exists()){ // it dont even get here
console.log('can register');
}
});
My db structure, so if it does not find my cellphone does not shot nothing at all
javascript
firebase firebase-realtime-database angularfire2 javascript
firebase firebase-realtime-database angularfire2 edited Nov 20 '18 at 14:09
KENdi
5,7192821
asked Nov 20 '18 at 11:36
Kevin Dias
334213
edited Nov 20 '18 at 14:09
KENdi
5,7192821
asked Nov 20 '18 at 11:36
Kevin Dias
334213
edited Nov 20 '18 at 14:09
KENdi
5,7192821
edited Nov 20 '18 at 14:09
KENdi
5,7192821
edited Nov 20 '18 at 14:09
KENdi
5,7192821
5,7192821
asked Nov 20 '18 at 11:36
Kevin Dias
334213
asked Nov 20 '18 at 11:36
Kevin Dias
334213
asked Nov 20 '18 at 11:36
Kevin Dias
334213
334213
1
Have you tried using "value" instead of "child_added" event? That is likely the issue here.
– Burhan B
Nov 20 '18 at 12:52
@BurhanB yep was the problem thanks sir
– Kevin Dias
Nov 20 '18 at 13:58
add a comment |
1
Have you tried using "value" instead of "child_added" event? That is likely the issue here.
– Burhan B
Nov 20 '18 at 12:52
@BurhanB yep was the problem thanks sir
– Kevin Dias
Nov 20 '18 at 13:58
1
1
Have you tried using "value" instead of "child_added" event? That is likely the issue here.
– Burhan B
Nov 20 '18 at 12:52
Have you tried using "value" instead of "child_added" event? That is likely the issue here.
– Burhan B
Nov 20 '18 at 12:52
@BurhanB yep was the problem thanks sir
– Kevin Dias
Nov 20 '18 at 13:58
@BurhanB yep was the problem thanks sir
– Kevin Dias
Nov 20 '18 at 13:58
add a comment |
1 Answer
1
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votes
solution was using "value" instead of "child_added"
The child_added event fires for each matching child under the node that you query. If there are no matching children, it will not fire.
This means that to test whether a node exists, you must use a value handler. And since a query can have multiple results, you will need to loop over the children.
answered Nov 20 '18 at 14:27
Kevin Dias
334213
1
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - From Review
– kometen
Nov 20 '18 at 15:23
add a comment |
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votes
solution was using "value" instead of "child_added"
The child_added event fires for each matching child under the node that you query. If there are no matching children, it will not fire.
This means that to test whether a node exists, you must use a value handler. And since a query can have multiple results, you will need to loop over the children.
answered Nov 20 '18 at 14:27
Kevin Dias
334213
1
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - From Review
– kometen
Nov 20 '18 at 15:23
add a comment |
solution was using "value" instead of "child_added"
The child_added event fires for each matching child under the node that you query. If there are no matching children, it will not fire.
This means that to test whether a node exists, you must use a value handler. And since a query can have multiple results, you will need to loop over the children.
answered Nov 20 '18 at 14:27
Kevin Dias
334213
1
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - From Review
– kometen
Nov 20 '18 at 15:23
add a comment |
solution was using "value" instead of "child_added"
The child_added event fires for each matching child under the node that you query. If there are no matching children, it will not fire.
This means that to test whether a node exists, you must use a value handler. And since a query can have multiple results, you will need to loop over the children.
answered Nov 20 '18 at 14:27
Kevin Dias
334213
solution was using "value" instead of "child_added"
The child_added event fires for each matching child under the node that you query. If there are no matching children, it will not fire.
This means that to test whether a node exists, you must use a value handler. And since a query can have multiple results, you will need to loop over the children.
answered Nov 20 '18 at 14:27
Kevin Dias
334213
edited Nov 20 '18 at 18:06
answered Nov 20 '18 at 14:27
Kevin Dias
334213
answered Nov 20 '18 at 14:27
Kevin Dias
334213
answered Nov 20 '18 at 14:27
Kevin Dias
334213
334213
1
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - From Review
– kometen
Nov 20 '18 at 15:23
add a comment |
1
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - From Review
– kometen
Nov 20 '18 at 15:23
1
1
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - From Review
– kometen
Nov 20 '18 at 15:23
Please use the edit link on your question to add additional information. The Post Answer button should be used only for complete answers to the question. - From Review
– kometen
Nov 20 '18 at 15:23
add a comment |
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1
Have you tried using "value" instead of "child_added" event? That is likely the issue here.
– Burhan B
Nov 20 '18 at 12:52
@BurhanB yep was the problem thanks sir
– Kevin Dias
Nov 20 '18 at 13:58