I'm using the firebase/polymerfire package from bower bower install firebase/polymerfire
how can i create some data in the database after a method has been triggered?
The document tag looks like it will display and update data. I would like to, when a user signs up, create some data for the user to use.
app.signInAnonymously = function() {
this.error = null;
this.$.auth.signInAnonymously();
// add default data for the user template
};
How can i use the default set() or push methods like the normal SDK?
How can i call this on an event from JavaScript?
When trying to bind a path to my document like
<firebase-document
path="/"
data="{{firebaseData}}">
</firebase-document>
{{firebaseData}}
the data won't display, but I have authentication working.
You can actually use the firebase api directly there since firebase-auth is already including it, but if you want to keep the element-based functionality you could do this:
Add an empty firebase-document to your template
<firebase-document id="mydoc"></firebase-document>
Then call its save function in your element
app.signInAnonymously = function() {
this.error = null;
this.$.auth.signInAnonymously();
// add default data for the user template
//set path to null somewhere to avoid overwriting data, I recommend doing it here since save's path update is lazy
this.$.mydoc.path = null;
//set data to the value to set/push
this.$.mydoc.data = {/*your data*/};
//call save, if the second parameter is falsey it'll call push to the first parameter if it's truthy it'll set the data to firstparam/secondparam
this.$.mydoc.save('path/to/users', userid);
};
As for getting data with firebase-document, check that you actually have data in your database and your security rules, if you still can't see your data then it might be related to this issue, do bear in mind that polymerfire is still in a pre-release state
Related
I am creating userproperties with PropertiesService, as
var userProperties = PropertiesService.getUserProperties();
for storing users single token for my add-on , When i set usertoken in userproperties with a key pair value as, userProperties.setProperty('USERTOKEN','token'); in an document.
Once i do this as per the userproperties scope i can retrieve the user properties value from any of the document by using userProperties.getProperty('USERTOKEN'); but,
When i do that the value is null (i.e), i cant retrieve the 'userProperties' value from other documents,
So that, the scope of the userproperties fails. The userproperties value is associated only with the particular document where it's created.
once my add-on is installed i used to check every time userproperties value for all documents ,
if(value)
{
retrieve data;
}
else
{
authorize;
}
Thus value is null and the user is made to authorize everytime for every new document. Since my add-on cant retrieve the value from userProperties.getProperty('USERTOKEN');
According to the documentation at Properties Service - Saving Data:
"Script properties can also be saved via the script editor user interface by going to File > Project properties and selecting the Project properties tab. User properties and document properties cannot be set or viewed in the user interface."
I'm not sure what it means but I think it means that even if you are able to set the property using script, the value will not update if you view it in File > Project Properties > User Properties.
But it doesn't mean that the property was not updated though. However, if it's a Script Property you set via script, the value will update in your view.
This I say because I tried it by setting it inside the doGet(). See the example below:
//Set properties as global variables
var userProperty = PropertiesService.getUserProperties();
var scriptProperty = PropertiesService.getScriptProperties();
function doGet() {
userProperty.setProperty('uservar', 'Hello');
scriptProperty.setProperty('scriptvar', 'World');
Logger.log(userProperty.getProperty('uservar'));
Logger.log(scriptProperty.getProperty('scriptvar'));
return HtmlService.createTemplateFromFile('index').evaluate();
}
I did it inside doGet() so that I can check it simply by refreshing my WebApp page.
Interestingly, the log shows the correct values (Hello, and World).
But if I visit the File > Project Properties, only the Script Propery value was updated, the User Property remains the same as the original value I set it for.
Hope this helps.
For some reason it seems that the PropertiesService does not work. Even when I use Google example in https://developers.google.com/apps-script/guides/properties#reading_data I am getting nulls. I have reverted back to the old UserProperties and it works, however it is supposed to be depreciated...
PropertiesService seem to be working for script properties though.
I have a view ObjectDisplay that is composed of two relevant tables: Object and State. State represents the state of an Object, and the view pulls some of the details from the most recent State for each Object.
On the page that is displaying this information, a user can enter some comments, which creates a new State. After creating the new State, I immediately pull the Object from ObjectDisplay and send it back to be dropped into a partial view and replace the Object in the grid on the page.
// Add new State.
db.States.Add(new State()
{
ObjectId = objectId,
Comments = comments,
UserName = username
});
// Save the changes (executes all of the above).
db.SaveChanges();
// Return the new Object information.
return db.Objects.Single(c => c.ObjectId == objectId);
According to my db trace, the Single call occurs about 70 ms after the SaveChanges call, and it occurs on the same SPID.
Now for the issue: The database defaults the value of RecordDate in State to GETUTCDATE() - I don't provide the date myself. What I'm seeing is that the Object returned has the State's RecordDate of the old State and the Comments of the new State information of the old State. I am seeing that the Object returned has the old State's information. When I refresh the page, all the correct information is there, but the wrong information is returned in the initial call from the database/EF.
So.. what could be wrong? Could the view not be updating quickly enough? Could something be going on with EF? I don't really know where to start looking.
If you've previously loaded the same Object entity in the same DbContext, EF will return the cached instance with the stale values, and ignore the values returned from SQL.
The simplest solution is to reload the entity before returning it:
var result = db.Objects.Single(c => c.ObjectId == objectId);
db.Entry(result).Reload();
return result;
This is indeed odd. In SQL Server views are not persisted by default and therefore show changes in the underlying data right away. You can create a clustered index on a view with effectively persists the query, but in that case the data is updated synchronously, so you should see the change right away.
If you are working with snapshot isolation level your changes might not be visible to other SPIDs right away, but as you are on the same SPID and do not use snapshot isolation, this cant be the culprit either.
The only thing left at this point is the application layer. Are you actually using the result of the Single call higher up in the call stack or does that get lost somewhere. I assume that a refresh of the page uses a different code path, which would explain why it is working there.
What i am doing in writing a script that lets the User interact with a data table. Every series that the user chooses creates a button, and then plots the series on a graph. if the user click the button it rooms the series. All there the data is stored in a hidden JSON string. the columns, or series that the user whats to see are stored in an array that i call index, it is also a hidden JSON string) Each button is connected to its own client handler, which has a
.forTargets(the index i was talking about).setTag(to the corresponding column in the data array)
and they are all connected to the same server handler. So when the button is clicked the client handler sets the tag for the index to the series that it is supposed to be removed. Now the server handler will run it get the index by ID and get the Tag. This is were it goes wrong. The tag is always null.
The first thing i tried was to see if my client handler was not working properly. So i set the tag of the index to some number, but the getTag method in the Server handler still returned null.
idk, but maybe Tags are not saved in the UI instance??
Below is the first bit of the Server handler.
function clickServer(e) {
e = e.parameter;
var app = UiApp.getActiveApplication();
var master = JSON.parse(e.dataTable, "reviver");
var index = JSON.parse(e.index, "reviver");
var hidden = app.getElementById("hiddenIndex");
var tag = hidden.getTag();
I think the issue you are meeting is more related to timing : handlers are called simultaneously, this is true for client an server handlers as well, that means that if the client handler changes a hidden tag value this change happens too late for the server handler function to 'see' it. What you should do is create a separate button to trigger the server handler that the user would use after all the other parameters where set.
This very same method is used in the known workaround used to get radioButtons value
Also, why do you use tags on the hidden widget ? you could use it with direct access by setValue() and e.parameter.hiddenName since they are already invisible by nature... ?
Note also that you can set a value in client handlers as long a these values are defined inside the Ui instance (the do Get function) either by constant variables or by another client Handler in the same function, as shown in the before mentioned example with radioButtons... but that's only a detail.
In this context if you need to get a widget value (inside the doGet function) you should of course use getValue() to get the widget value as no e.parameter is available at this time.
I hope I've been clear enough, re-reading this I'm not very sure but.... just ask if something is missing ;-)
The tags values are passed to handlers via parameters. In this post this fact is explained in details.
I have a program that adds a lot of new data to a database using Linq2SQL.
In order to avoid DuplicateKeyExceptions, I check for the existence of the key, before trying to add a new value into the database.
As of now, I can't provide an isolated test-case, but I have simplified the code as much as possible.
// newValue is created outside of this function, with data read from a file
// The code is supposed to either add new values to the database, or update existing ones
var entryWithSamePrimaryKey = db.Values.FirstOrDefault(row => row.TimestampUtc == newValue.TimestampUtc && row.MeterID == newValue.MeterID);
if (entryWithSamePrimaryKey == null)
{
db.Values.InsertOnSubmit(newValue);
db.SubmitChanges();
}
else if(entryWithSamePrimaryKey.VALUE != newValue.VALUE)
{
db.Values.DeleteOnSubmit(entryWithSamePrimaryKey);
db.SubmitChanges();
db.Values.InsertOnSubmit(newValue);
db.SubmitChanges();
}
Strangely enough, when I look at the exceptions in the application log, as to which items cause trouble, I am unable to find ANY of them in the database.
I suspect this happens within the update code, so that the items get removed from the database, but not added again.
I will update my code to deliver more information, and then update this post accordingly.
If the error is generated in the update block, you can merge the object in the update case without deleting entryWithSamePrimaryKey, but valorizing it with the property value of newValue and than save the changes.
I have built a favorite-tab in my application that displays entries in a database that are flagged as such. On the backside this works as it should, but I can't figure out how to reload the favorites tab after changes have been made. When I quit and relaunch the app though, the updates appear as they should.
In essence I have the same problem as is presented here: http://developer.appcelerator.com/question/31211/tab---tableview--database-reload
"I have a 'search' and 'search history' tab in my application. Every search executed under this tab gets inserted into my local db.
However the new search is not reflected in the tableview retrieving data from the DB in the 'search history' tab when i browse to it, after searching.
The latest search, however, gets loaded when I exit the app and relaunch it.
I need some help in figuring out how to trigger the tableview reload without exiting the app.
SOLUTION UPDATE:
I feel 'noobish' for asking this question but it was really so simple
I added a 'focus' eventlistener for the window housing the tab to load the data.
win.addEventListener('focus', function() { loadDBdata(); });
This seems reasonable, but what should the loadDBdata function should contain?
I would greatly appreciate any pointers to this.
i would suggest firing an event when the favorites are updated and having an event listenter on the table that holds the favorites list. When it receives the event, it should update the tables contents.
see this question I just answered it should provide a guide for solving your problem also
Problems with refresh function for page, in Appcelerator
the loaddb function should contain something like:
// init database
var db = Ti.Database.install('path/to/database.db','myDB');
// your request
var sql = 'SELECT * FROM myDatabaseTable';
// the result from that request
var myContent = db.execute(sql);
// need to put the result in a valid structure before inserting into your tableview
var data = [];
while (myContent.isValidRow()){
// your tableviewrow
var row = {
title = myContent.field(0);
};
data.push(row);
myContent.next();
};
// need to close stuff (!)
myContent.close();
db.close();
// finally return data
return data;