I'm absolutely loving BreezeJS and was so surprised to see that my Enum values were being displayed as their text values and not their ordinal ones! What I would love to be able to do is, on the client side, open the MetadataStore, fetch the enumeration and modify it's textual properties for display purposes.
Is this currently possible? From my research it would appear not, but I'm wondering if there is perhaps a simple workaround. Everything I've tried has involved a large number of hacks and server-side attributes, but to no avail, or the solution just seemed overly complex and not worth the benefits.
Here is what I said about how to get the enum values from raw metadata in another SO comment.
The enum values are available in the metadata generated by EF and sent to a Breeze client. I agree Breeze should pick them up automatically and put them somewhere so you don't have to make a separate request for them or extract them from the raw metadata passed to the MetadataStore.fetchMetadata success callback. It's on our backlog.
Meanwhile, you'll have to get them by hand. There is a DocCode test that shows how:
/*********************************************************
* Can can get enum types from raw EF-generated metadata
* Related to feature request #2271: Extract enum values from server metadata
*************************************************************/
asyncTest("can get enum type from raw EF-generated metadata", function() {
var serviceName = testFns.foosMetadataServiceName;
var store = new breeze.MetadataStore();
store.fetchMetadata(serviceName)
.then(metaSuccess, metaFail).fail(handleFail).fin(start);
function metaSuccess(rawMetadata) {
ok(true, "foos metadata fetched");
var enumType = rawMetadata.schema && rawMetadata.schema.enumType;
if (enumType && enumType.name ==='Color') {
var members = enumType.member;
ok(members.length,
"should have several members; members are: " + JSON.stringify(members));
} else {
ok(false, "metadata should have had one enumType, 'Color'.");
}
}
function metaFail(error) {
ok(false, "foos metadata fetch failed: " + error.message);
}
});
we're using Breeze with NHibernate and wand to do the same. Metadata generated for NHibernate are standard breeze Metadata and doesn't contain the Schema part. Any ideas how to do it?
edit: To fix our issue I added a list of all used enums in the metadata(like the structuralTypes node). Then we cache it on the client when the metadata are retrieved.
https://github.com/lnu/breeze.server.net/commit/65ad687ad13c4dd9f4a6ab6a3ed09e407e2b58ec
Thanks
Related
i´m currently building a Flutter app that includes a larger set of data (like 2000-10000 pieces of text).
I´m relatively new to Flutter delevopment so i have no idea what databases are the best for this case.
The app needs no connection to the internet a all data is on the device after downloading.
You only need to query this data extensively and build now datasets out of it.
I researched a bit, but the most common used database (hive) seems not to be suitable for my needs.
If anyone could help, I´d appreciate it.
It seems ObjectBox is best For Large Data ,it Performs very Well
[Check this package best suits for your data][1]
import 'package:objectbox/objectbox.dart';
class Note {
// Each "Entity" needs a unique integer ID property.
// Add `#Id()` annotation if its name isn't "id" (case insensitive).
int id = 0;
String? text;
DateTime date;
#Transient() // Make this field ignored, not stored in the database.
int? notPersisted;
// An empty default constructor is needed but you can use optional args.
Note({this.text, DateTime? date}) : date = date ?? DateTime.now();
// Note: just for logs in the examples below(), not needed by ObjectBox.
toString() => 'Note{id: $id, text: $text}';
}```
I'm working on my first Angular project and I've been thinking of the best way to word this question for a while now but I'm going to give this a shot.
I'm building an app that uses the Veralite (MiOS) to return device data in json format. The first request returns all of the devices on the system (example below).
"devices":[
{
"name":"Bedroom Light",
"altid":"4",
"id":6,
"category":2,
"subcategory":0,
"room":0,
"parent":1,
"status":"0",
"level":"0",
"state":-1,
"comment":""
},
{
"name":"Office Light",
"altid":"6",
"id":18,
"category":2,
"subcategory":0,
"room":0,
"parent":1,
"level":"0",
"status":"0",
"state":-1,
"comment":""
}
Once all of the devices are returned, my script begins long polling the vera engine. Once a change to a device is made the results of the long poll are returned, but the results only include the devices that were changed (example below).
"devices":[
{
"altid":"6",
"id":"18",
"subcategory":"0",
"room":"0",
"parent":"1",
"level":"20",
"status":"1",
"state":"4",
"comment":"Office Light: Transmit was ok"
}
What I am trying to wrap my head around, is the proper way to update the existing devices array with the newly updated data. Would I need to convert them to arrays, then loop through each array and try to match them by keys?
Hopefully I asked this as clearly as possible.
EDIT: Just to update this a bit for anyone that stumbles across this, specifically people interested in developing for the Veralite. The ID returned from the original request will be returned as an integer, but when long polling the engine, the ID will be returned as a string. So even though the selected answer is correct, you'll need to either parse the updated device ID as an integer (parseInt), or only use a == instead of a === when filtering the devices.
You can loop through the object fields just like you can loop through an array with Object.keys.
Conceptually something like:
Step 1) Find the updated product, by the field id:
var previousVersionDevice = $scope.devices.filter(function(item) {
return item.id === updateDevice.id; // Keep only the one existing device that matches id
})[0];
Step 2) Loop through the keys in the product and overwrite the previous values with the ones received.
Object.keys(updatedDevice).forEach(function(key) {
previousVersionDevice[key] = updatedDevice[key]; // Overwrite/add all from updated version
});
yes, you can loop through and find the matching device via some sort of unique key (assuming id is unique and won't change, you can use that).
I'm trying to figure out how to populate a table from a JSON array. So far, I can populate my table cells perfectly fine by using the following code:
self.countries = [[NSArray alloc]initWithObjects:#"Argentina",#"China",#"Russia",nil];
Concerning the JSON, I can successfully retrieve one line of text at a time and display it in a label. My goal is to populate an entire table view from a JSON array. I tried using the following code, but it still won't populate my table. Obviously I'm doing something wrong, but I searched everywhere and still can't figure it out:
NSURL *url = [NSURL URLWithString:#"http://BlahBlahBlah.com/CountryList"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON)
{
NSLog(#"%#",[JSON objectForKey:#"COUNTRIES"]);
self.countries = [JSON objectForKey:#"COUNTRIES"];
}
failure:nil];
[operation start];
I am positive that the data is being retrieved, because the NSLog outputs the text perfectly fine. But when I try setting my array equal to the JSON array, nothing happens. I know the code is probably wrong, but I think I'm on the right track. Your help would be much appreciated.
EDIT:
This is the text in the JSON file I'm using:
{
"COUNTRIES": ["Argentina", "China", "Russia",]
}
-Miles
It seems that you need some basic JSON parsing. If you only target iOS 5.0 and above devices, then you should use NSJSONSerialization. If you need to support earlier iOS versions, then I really recommend the open source JSONKit framework.
Having recommended the above, I myself almost always use the Sensible TableView framework to fetch all data from my web service and automatically display it on a table view. Saves me a ton of manual labor and makes app maintenance a breeze, so it's probably something to consider too. Good luck!
I've been asked to set up a process which monitors the active directory, specifically certain accounts, to check that they are not locked so that should this happen, the support team can get an early warning.
I've found some code to get me started which basically sets up requests and adds them to a notification queue. This event is then assigned to a change event and has an ObjectChangedEventArgs object passed to it.
Currently, it iterates through the attributes and writes them to a text file, as so:
private static void NotifierObjectChanged(object sender,
ObjectChangedEventArgs e)
{
if (e.ResultEntry.Attributes.AttributeNames == null)
{
return;
}
// write the data for the user to a text file...
using (var file = new StreamWriter(#"C:\Temp\UserDataLog.txt", true))
{
file.WriteLine("{0} {1}", DateTime.UtcNow.ToShortDateString(), DateTime.UtcNow.ToShortTimeString());
foreach (string attrib in e.ResultEntry.Attributes.AttributeNames)
{
foreach (object item in e.ResultEntry.Attributes[attrib].GetValues(typeof(string)))
{
file.WriteLine("{0}: {1}", attrib, item);
}
}
}
}
What I'd like is to check the object and if a specific field, such as name, is a specific value, then check to see if the IsAccountLocked attribute is True, otherwise skip the record and wait until the next notification comes in. I'm struggling how to access specific attributes of the ResultEntry without having to iterate through them all.
I hope this makes sense - please ask if I can provide any additional information.
Thanks
Martin
This could get gnarly depending upon your exact business requirements. If you want to talk in more detail ping me offline and I'm happy to help over email/phone/IM.
So the first thing I'd note is that depending upon what the query looks like before this, this could be quite expensive or error prone (ie missing results). This worries me somewhat as most sample code out there gets this wrong. :) How are you getting things that have changed? While this sounds simple, this is actually a somewhat tricky question in directory land, given the semantics supported by AD and the fact that it is a multi-master system where writes happen all over the place (and replicate in after the fact).
Other variables would be things like how often you're going to run this, how large the data set could be in AD, and so on.
AD has some APIs built to help you here (the big one that comes to mind is called DirSync) but this can be somewhat complicated if you haven't used it before. This is where the "ping me offline" part comes in.
To your exact question, I'm assuming your result is actually a SearchResultEntry (if not I can revise, tell me what you have in hand). If that is the case then you'll find an Attributes field hanging off of that guy, and from there there is AttributeNames and Values. I think you'll see how it works from there if you have Values in hand, for example:
foreach (var attr in sre.Attributes.Values)
{
var da = (DirectoryAttribute)attr;
Console.WriteLine(da.Name);
foreach (var val in da.GetValues(typeof(byte[])))
{
// Handle a byte[] val ...
}
}
As I said, if you have something other than a SearchResultEntry in hand, let us know and I can revise the code sample.
I'm trying to retrieve a user object from a foreign key reference but each time I try to do so nothing gets returned...
My table is set up like this:
FBUserID long,
UserID uniqueidentifier
so I have my repository try to get the User when it's provided the FBUserID:
public User getUserByFBuid(long uid)
{
User fbUser = null;
IEnumerable<FBuid> fbUids = _myEntitiesDB.FBuidSet.Where(user => user.FBUserID == uid);
fbUser = fbUids.FirstOrDefault().aspnet_Users;
return fbUser;
}
I've checked that the uid (FBUserID) passed in is correct, I've check that the UserID is matched up to the FBUserID. And I've also checked to make sure that fbUids.Count() > 0...
I've returned fbUids.FirstOrDefault().FBUserID and gotten the correct FBUserID, but any time I try to return the aspnet_Users or aspnet_Users.UserName, etc... I don't get anything returned. (I'm guessing it's getting an error for some reason)
I don't have debugging set up properly so that's probably why i'm having so much troubles... but so far all the checking I've done I've been doing return this.Json(/* stuff returned form the repository */) so that I can do an alert when it gets back to the javascript.
Anyone know why I would have troubles retrieving the user object from a foreign key relationship like that?
Or do you have any suggestions as to finding out what's wrong?
For now, with Entity Framework 1, you don't get automatic delayed loading, e.g. if you want to traverse from one entity to the next, you need to either do an .Include("OtherEntity") on your select to include those entities in the query, or you need to explicitly call .Load("OtherEntity") on your EntityContext to load that entity.
This was a design decision by the EF team not to support automagic deferred loading, since they considered it to be too dangerous; they wanted to make it clear and obvious to the user that he is also including / loading a second set of entities.
Due to high popular demand, the upcoming EF v4 (to be released with .NET 4.0 sometime towards the end of 2009) will support the automatic delayed loading - if you wish to use it. You need to explicitly enable it since it's off by default:
context.ContextOptions.DeferredLoadingEnabled = true;
See some articles on that new feature:
A Look at Lazy Loading in EF4
POCO Lazy Loading
Don't know if this is what you are asking but i do a join like so;
var votes = from av in dc.ArticleVotes
join v in dc.Votes on av.voteId equals v.id
where av.articleId == articleId
select v;
Did this help or am I off base?