I have a field called jobsPosted as seen in the picture, so I want to add another job, I have dishwasher and waiter already. But I get an error with this query
db.collection("companies").doc("Tiradito").field("jobsPosted").set(postJobObject).then(function() {
console.log("Document successfully written!");
});
That's my postJobbject
var postJobObject = {
"position": this.state.selected,
"timeSchedule": this.state.timeSchedule,
"compensation" : this.state.compensation,
"experience" : this.state.experience,
"description" : this.state.description
}
pass the option to merge the new data with any existing document to avoid overwriting entire documents
var cityRef = db.collection('cities').doc('BJ');
var setWithMerge = cityRef.set({
capital: true
}, { merge: true });
source: https://firebase.google.com/docs/firestore/manage-data/add-data
Try
jobsPosted = {}
var postJobObject = {
"position": this.state.selected,
"timeSchedule": this.state.timeSchedule,
"compensation" : this.state.compensation,
"experience" : this.state.experience,
"description" : this.state.description
}
jobsPosted['newJob'] = postJobObject;
Then use update
db.collection("companies").doc("Tiradito").update(jobsPosted).then(function() {
console.log("Document successfully written!");
});
Related
I have a collection users like this:
[{
'uid' : '1',
'favourites' : [
{ // fav1 },
{ // fav2 },
{ // fav3 },
etc
]
},
{
'uid' : '2',
'favourites' : [
{ // fav1 },
{ // fav2 },
{ // fav3 },
etc
]
},
etc
]
In some situations I have to update the favourites collection with a new "fav" and I can do that in this way:
final doc = FirebaseFirestore.instance.collection('users').doc(userId);
doc.update({ 'favourites': FieldValue.arrayUnion([fav.toJson()]) });
however the item might be not there so I have to use doc.set to create a new item. As I am new with Firebase, what is a "best practice" for a problem like this (if the element is not there create it first, otherwise update it)?
You can specify a merge option to set, which does precisely what you want:
doc.set({ 'favourites': FieldValue.arrayUnion([fav.toJson()]) }, SetOptions(merge : true))
You can use a function that can check if there is a doc or not with that specific info. And you can create a if-else statement depends on if there is a doc named like that or not.
An example function for checking the doc:
Future<bool> checkIfDocExists(String stuffID) async {
try {
/// Check If Document Exists
// Get reference to Firestore collection
var collectionRef = FirebaseFirestore.instance
.collection('favorites');
var doc = await collectionRef.doc(userId).get();
return doc.exists;
} catch (e) {
throw e;
}
}
I have a sample Table info as -
items: [{
"key1":"value1",
"key2":"value2"
}
]
I have to update this like below -
items: [{
"key1":"value1",
"key2":"value2",
"key3": [{"subkey1":"value1"}, {"subkey2:"value2"}]
}
]
You can use Update API with SET operator.
In the below example, categoryList has the key3 value mentioned in OP.
Sample Code:-
var docClient = new AWS.DynamoDB.DocumentClient();
var categoryList = [{"subkey1":"value1"}, {"subkey2" : "value2"}];
var params = {
TableName : "Movies",
Key : {
"yearkey" : 2016,
"title" : "The Big New Movie 1"
},
UpdateExpression : "set #category = :categoryList",
ExpressionAttributeNames: {
'#category' : 'category'
},
ExpressionAttributeValues: {':categoryList' : categoryList},
ReturnValues: 'UPDATED_NEW'
};
console.log("Updating the item...");
docClient.update(params, function(err, data) {
if (err) {
console.error("Unable to update item. Error JSON:", JSON.stringify(err, null, 2));
} else {
console.log("UpdateItem succeeded:", JSON.stringify(data));
}
});
I have an extended question to this question.
What if the player belong to more than one team?
I have this
json
"Players" : {
"-YRHd4IjrjsBXx__B" : {
"name" : "The best forward",
"creationDate" : "2016-02-26 15:50:39",
"teams" : {
"-KAByPeIz4IjrjsBXx__B" : true,
"-KEFPuCXcqOah_GJwsMCu" : true,
"-KEwuQxvGpYTEJ7YQ58-l" : true,
"-KKF8vPtf8J7cfqFh2PLm" : true
},
},
etc...
}
players-service.js
getPlayers: function(teamid) {
var Players = {};
var teamsIndex = ref.child('teams/' + teamid + '/players/');
var playersIndex = ref.child('players/');
teamsIndex.on('child_added', function(snapshot) {
var playerKey = snapshot.key;
playersIndex.child(playerKey).on('value', function(playersnap){
$timeout(function() {
console.log("key", playerKey);
players[playerKey] = playersnap.val();
});
});
});
teamIndex.on('child_removed', function(snapshot) {
$timeout(function(snapshot) {
delete players[snapshot.key()];
});
});
return players;
}
But it returns a list of object. I know that I could probably query/change the data structure to/in firebase and return it as a $firebaseArray which I prefer as I use angularfire.
You usually structure your data depending on how you want to retrieve them.
From my understanding (correct me if I'm wrong) you want to get all the players in a team. For this purpose I would use this structure:
"Players": {
"player1": {...},
"player2": {...},
"player3": {...}
},
"Teams': {
"team1": {...},
"team2": {...}
},
"TeamPlayers" : {
"team1": {
"player1": true,
"player2": true
},
"team2": {
"player1": true,
"player3": true
}
}
Or using an array
"TeamPlayers" : {
"team1": [
0: "player1",
1: "player2"
]
}
I have firebase database in this form.
"items":{
"-Jp9VLYBwENfNVLKYyCG" : {
"-Jp9VMKkTUggcMrUCO8S" : {
"author" : "facebook:#########",
"created" : 1431474107638,
},
"-Jp9VobJP0qbSbbEdyW0" : {
"author" : "facebook:#########",
"created" : 1431474227548
}
},
"-JpEbifKeRj-_H7TWhQ2" : {
"-JpEbrnT6SFRFc6U_HWX" : {
"author" : "facebook:#########",
"created" : 1431559961683
},
"-JpEby5mZuQMsU-9YCpk" : {
"author" : "facebook:##########",
"created" : 1431559987495
}
}
}
I want to add the following object to each $id containing author and created key-value pairs.
upVote: {
active: true,
total: 0
},
downVote: {
active: true,
total: 0
}
I am first trying to fetch the values using DataSnapshot. But it doesn't print the keys in console. What is wrong here?
var ref = new Firebase(FBURL + "/items");
ref.once("value", function(snapshot) {
console.log("snapshot key: " + snapshot.key());
snapshot.forEach(function(childSnapshot){
var key = childSnapshot.key();
var val = childSnapshot.val();
console.log("child snapshot key: " + key);
childSnapshot.forEach(function(deepSnap){
console.log("deep shot key: " + deepSnap.key());
});
});
});
RESOLVED The problem was that I had some security rules set up with read and write permissions. Therefore wasn't allowing me to read the element from the user scope that I was calling the script. It was one gotcha like problems.
After this step, it was easy to update the database with values:
var deepRef = ref.child(key).child(deepSnap.key());
deepRef.update({upVote: {
active: true,
total: 0
},downVote: {
active: true,
total: 0
}});
I'm trying to fetch all flowers data which belongs to a certain user, in this case simplelogin:69.
I'm starting with fetching all flower keys from the user, like this:
/users/simplelogin:69/flowers/
var ref = new Firebase("https://URL.firebaseio.com/users/"+uid+"/flowers");
var sync = $firebase(ref);
Now im stuck figuring out a clean way to fetch all the flower data by looping thrue every flower key from simplelogin:69 without looping thrue EVERY key in /flowers/ (in example below i only have three flower keys but in production i might have 10k).
I tried FirebaseIndex and firebase-util, but can't get it to work properly. Do anyone have any tips or anything? I've read previous posts here on stack but most seems out of date or not really suited for what im going for. Would really appriciate anything that can be solved with AngularFire.
Kind regards,
Elias
{
"flowers" : {
"-JiU57sFAfQwYtIq-LCl" : {
"image" : "test",
"name" : "test",
"type" : "Roses",
"uid" : "simplelogin:69"
},
"-JiU9-3ajlnFLpyUmBvL" : {
"image" : "dasdasd",
"name" : "sadasdas",
"type" : "Roses",
"uid" : "simplelogin:69"
},
"-JiUF-mioK3jQCYy6ZiG" : {
"image" : "ss",
"name" : "ss",
"type" : "Lilies",
"uid" : "simplelogin:69"
}
},
"users" : {
"simplelogin:69" : {
"flowers" : {
"-JiU57sFAfQwYtIq-LCl" : true,
"-JiU9-3ajlnFLpyUmBvL" : true,
"-JiUF-mioK3jQCYy6ZiG" : true
}
},
"simplelogin:70" : {
},
"simplelogin:71" : {
}
}
}
Got it to work now, thanks to #Kato 's answer on thread:
Firebase data normalized. How should I fetch a collection based on this structure? (tried it before creating this thread but didnt get it to work, so made som small changes and now it works).
Posting the solution for anyone stubling upon the same situation:
$scope.flowers = {};
var flowerRef = new Firebase('https://URL.firebaseio.com/flowers/');
var keyRef = new Firebase('https://URL.firebaseio.com/users/'+checkAuth.auth.uid+'/flowers');
keyRef.on('child_added', function(snap) {
var flowerId = snap.key();
flowerRef.child(flowerId).on('value', function(snap) {
$timeout(function() {
if( snap.val() === null ) {
delete $scope.flowers[flowerId];
}
else {
$scope.flowers[flowerId] = snap.val();
}
});
});
});
keyRef.on('child_removed', function(snap) {
var flowerId = snap.key();
$timeout(function(snap) {
delete $scope.flowers[flowerId];
});
});
This really is a tough issue with Firebase. If you implement a custom factory object for the user's flower list, you could dynamically request new flower data as the list changes.