For the following data store that only contains one item,
var Model = require('dmodel/Model');
var Memory = require('dstore/Memory');
var jsonSchema = require('dmodel/extensions/jsonSchema');
var declare = require('dojo/_base/declare');
var formStore = (declare([Memory]))({
Model: jsonSchema(formSchema),
idProperty: "formId",
});
var formProperties = {
"formName": "formName",
"formId": 'xyz',
"formType": 'formType'
};
formStore.setData([formProperties]);
I want to do the following
var item = formStore.getSync('xyz');
//get a property object from an data object,
var property = item.property('formId');
//request a change in the value of this property
property.put('abc');
formStore.getIdentity(formStore.data[0]) //returns 'abc'
**BUT**
formStore.getSync('abc') //returns undefined, even though it shows as 'abc' in the data array.
Even though the value of the property changed, I am unable to retrieve it any more by the new Id.
Your code looks confusing, but seems I understood it correctly.
From my point of view you have two options here:
Use some another value as idProperty which won't be changed;
Remove initial item and place new one with new id;
Changing id of item in store is bad idea.
Related
i have a database containing Song objects. The song class has > 30 properties.
My Music Tagging application is doing changes on a song on the file system.
It then does a lookup in the database using the filename.
Now i have a Song object, which i created in my Tagging application by reading the physical file and i have a Song object, which i have just retrieved from the database and which i want to update.
I thought i just could grab the ID from the database object, replace the database object with my local song object, set the saved id and store it.
But Raven claims that i am replacing the object with a different object.
Do i really need to copy every single property over, like this?
dbSong.Artist = songfromFilesystem.Artist;
dbSong.Album = songfromFileSystem.Album;
Or are there other possibilities.
thanks,
Helmut
Edit:
I was a bit too positive. The suggestion below works only in a test program.
When doing it in my original code i get following exception:
Attempted to associate a different object with id 'TrackDatas/3452'
This is produced by following code:
try
{
originalFileName = Util.EscapeDatabaseQuery(originalFileName);
// Lookup the track in the database
var dbTracks = _session.Advanced.DocumentQuery<TrackData, DefaultSearchIndex>().WhereEquals("Query", originalFileName).ToList();
if (dbTracks.Count > 0)
{
track.Id = dbTracks[0].Id;
_session.Store(track);
_session.SaveChanges();
}
}
catch (Exception ex)
{
log.Error("UpdateTrack: Error updating track in database {0}: {1}", ex.Message, ex.InnerException);
}
I am first looking up a song in the database and get a TrackData object in dbTracks.
The track object is also of type TrackData and i just put the ID from the object just retrieved and try to store it, which gives the above error.
I would think that the above message tells me that the objects are of different types, which they aren't.
The same error happens, if i use AutoMapper.
any idea?
You can do what you're trying: replace an existing object using just the ID. If it's not working, you might be doing something else wrong. (In which case, please show us your code.)
When it comes to updating existing objects in Raven, there are a few options:
Option 1: Just save the object using the same ID as an existing object:
var song = ... // load it from the file system or whatever
song.Id = "Songs/5"; // Set it to an existing song ID
DbSession.Store(song); // Overwrites the existing song
Option 2: Manually update the properties of the existing object.
var song = ...;
var existingSong = DbSession.Load<Song>("Songs/5");
existingSong.Artist = song.Artist;
existingSong.Album = song.Album;
Option 3: Dynamically update the existing object:
var song = ...;
var existingSong = DbSession.Load<Song>("Songs/5");
existingSong.CopyFrom(song);
Where you've got some code like this:
// Inside Song.cs
public virtual void CopyFrom(Song other)
{
var props = typeof(Song)
.GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance)
.Where(p => p.CanWrite);
foreach (var prop in props)
{
var source = prop.GetValue(other);
prop.SetValue(this, source);
}
}
If you find yourself having to do this often, use a library like AutoMapper.
Automapper can automatically copy one object to another with a single line of code.
Now that you've posted some code, I see 2 things:
First, is there a reason you're using the Advanced.DocumentQuery syntax?
// This is advanced query syntax. Is there a reason you're using it?
var dbTracks = _session.Advanced.DocumentQuery<TrackData, DefaultSearchIndex>().WhereEquals("Query", originalFileName).ToList();
Here's how I'd write your code using standard LINQ syntax:
var escapedFileName = Util.EscapeDatabaseQuery(originalFileName);
// Find the ID of the existing track in the database.
var existingTrackId = _session.Query<TrackData, DefaultSearchIndex>()
.Where(t => t.Query == escapedFileName)
.Select(t => t.Id);
if (existingTrackId != null)
{
track.Id = existingTrackId;
_session.Store(track);
_session.SaveChanges();
}
Finally, #2: what is track? Was it loaded via session.Load or session.Query? If so, that's not going to work, and it's causing your problem. If track is loaded from the database, you'll need to create a new object and save that:
var escapedFileName = Util.EscapeDatabaseQuery(originalFileName);
// Find the ID of the existing track in the database.
var existingTrackId = _session.Query<TrackData, DefaultSearchIndex>()
.Where(t => t.Query == escapedFileName)
.Select(t => t.Id);
if (existingTrackId != null)
{
var newTrack = new Track(...);
newTrack.Id = existingTrackId;
_session.Store(newTrack);
_session.SaveChanges();
}
This means you already have a different object in the session with the same id. The fix for me was to use a new session.
I am trying to add new row in datatables, and by using the API .any() to check if the id is already exist in the rows and if it exist I will not add new row to my datatable, and here is the result form my request from databse see http://pastie.org/10196001 , but I am having trouble in checking.
socket.on('displayupdate',function(data){
var dataarray = JSON.parse(data);
dataarray.forEach(function(d){
if ( table.row.DT_RowId(d.DT_RowId).any() ) { // TypeError: table.row.DT_RowId is not a function
console.log('already exist cannot be added');
}else{
table.row.add(d).draw();
}
});
});
Thank you in advance.
You get the error, of course, because DT_RowId not is a function in the API. But DT_RowId is in fact the one and only property that get some special treatment from dataTables :
By assigning the ID you want to apply to each row using the property
DT_RowId of the data source object for each row, DataTables will
automatically add it for you.
So why not check rows() for that automatically injected id along with any()?
socket.on('displayupdate',function(data){
var DT_RowId,
dataarray = JSON.parse(data);
dataarray.forEach(function(d){
DT_RowId = d.DT_RowId;
if (table.rows('[id='+DT_RowId+']').any()) {
console.log('already exist cannot be added');
} else {
table.row.add(d).draw();
}
});
});
simplified demo -> http://jsfiddle.net/f1yyuz1c/
After I execute breeze query as shown below:
var breezeQuery = function(){
var query = EntityQuery.from('TableA')
.inlineCount();
function querySuceeded(data) {
//data.results[0] contains the entity
}
manager.executeQuery(query)
.then(querySuceeded)
}
I get the entity in data.results[0] which contains properties as well as other information like entityAspect etc.
How can I get the property names present in a breeze entity ?
Use the MetadataStore. Something like this:
var tableAType = manager.metadataStore.getEntityType("TableA");
var dataProperties = tableAType.dataProperties;
var navigationProperties = tableAType.navigationProperties;
or from an instance of a entity ( not a projection), since every entity will have an 'entityType' property you can also do this:
var tableAType = tableAInstance.entityType;
var dataProperties = tableAType.dataProperties;
var navigationProperties = tableAType.navigationProperties;
Also see: http://www.breezejs.com/sites/all/apidocs/classes/EntityType.html
Object.keys(data.result[0]) is the vanilla JavaScript way to get all properties of the data.result[0] object. Just saying.
Jay's way of course winnows those down to the properties monitored by Breeze, the persisted properties in particular. That's probably what you meant :-)
I have a table which gets its data server-side, using custom server-side initialization params which vary depending upon which report is produced. Once the table is generated, the user may open a popup in which they can add multiple additional filters on which to search. I need to be able to use the same initialization params as the original table, and add the new ones using fnServerParams.
I can't figure out how to get the original initialization params using the datatables API. I had thought I could get a reference to the object, get the settings using fnSettings, and pass those settings into a new datatables instance like so:
var oSettings = $('#myTable').dataTable().fnSettings();
// add additional params to the oSettings object
$('#myTable').dataTable(oSettings);
but the variable returned through fnSettings isn't what I need and doesn't work.
At this point, it seems like I'm going to re-architect things so that I can pass the initialization params around as a variable and add params as needed, unless somebody can steer me in the right direction.
EDIT:
Following tduchateau's answer below, I was able to get partway there by using
var oTable= $('#myTable').dataTable(),
oSettings = oTable.fnSettings(),
oParams = oTable.oApi._fnAjaxParameters(oSettings);
oParams.push('name':'my-new-filter', 'value':'my-new-filter-value');
and can confirm that my new serverside params are added on to the existing params.
However, I'm still not quite there.
$('#myTable').dataTable(oSettings);
gives the error:
DataTables warning(table id = 'myTable'): Cannot reinitialise DataTable.
To retrieve the DataTables object for this table, please pass either no arguments
to the dataTable() function, or set bRetrieve to true.
Alternatively, to destroy the old table and create a new one, set bDestroy to true.
Setting
oTable.bRetrieve = true;
doesn't get rid of the error, and setting
oSettings.bRetrieve = true;
causes the table to not execute the ajax call. Setting
oSettings.bDestroy = true;
loses all the custom params, while setting
oTable.bDestroy = true;
returns the above error. And simply calling
oTable.fnDraw();
causes the table to be redrawn with its original settings.
Finally got it to work using fnServerParams. Note that I'm both deleting unneccessary params and adding new ones, using a url var object:
"fnServerParams": function ( aoData ) {
var l = aoData.length;
// remove unneeded server params
for (var i = 0; i < l; ++i) {
// if param name starts with bRegex_, sSearch_, mDataProp_, bSearchable_, or bSortable_, remove it from the array
if (aoData[i].name.search(/bRegex_|sSearch_|mDataProp_|bSearchable_|bSortable_/) !== -1 ){
aoData.splice(i, 1);
// since we've removed an element from the array, we need to decrement both the index and the length vars
--i;
--l;
}
}
// add the url variables to the server array
for (i in oUrlvars) {
aoData.push( { "name": i, "value": oUrlvars[i]} );
}
}
This is normally the right way to retrieve the initialization settings:
var oSettings = oTable.fnSettings();
Why is it not what you need? What's wrong with these params?
If you need to filter data depending on your additional filters, you can complete the array of "AJAX data" sent to the server using this:
var oTable = $('#myTable').dataTable();
var oParams = oTable.oApi._fnAjaxParameters( oTable );
oParams.push({name: "your-additional-param-name", value: your-additional-param-value });
You can see some example usages in the TableTools plugin.
But I'm not sure this is what you need... :-)
I've the following:
using (ISession session = Config.SessionFactory.OpenSession())
{
using (ITransaction transaction = session.BeginTransaction())
{
// This is a System.Collections.ArrayList,contains all my records returned from the session
var list = session.CreateSQLQuery(selectQuery).List();
// I want to put these records in an ObservableCollection of a specific Type
// Something like htis:
MyCollection = new ObservableCollection<MyType>(list);
}
}
This is not working and casting isn't an option here. Is there any way to put my retrurned list to the ObservableCollection?
I've got my ObservableCollection filled by using the following:
var query = session.CreateSQLQuery(selectQuery).AddEntity(typeof(MyType));
myObservableCollection = new ObservableCollection<MyType>(query.List<MyType>());
The List() returns ArrayList. Each value in ArrayList has some value which is type of object.
It can not be converted into directly any specific class. so create a mapping file then only you can get list of your required object.