i try to het all album names via EXPO MediaLibrary, however MediaLibrary.getAlbumsAsync() only returns user created albums. Can anyone please suggest how you handled this situation and get ios smart albums as well? Thanks for your support and guidence.
I know this is late, but for the benefit of anyone else who may find this helpful, the solution here is to pass in as parameters the option to include smart albums in the search. This is how you do it:
const getAlbums = await MediaLibrary.getAlbumsAsync({includeSmartAlbums: true})
This will return an array of objects representing the albums, including Recents album.
const isRecent = await MediaLibrary.getAlbumAsync('Recent')
if (isRecent) {
console.log('exist')
} else {
const allPhotos = await MediaLibrary.getAssetsAsync()
const recentAlbum = await MediaLibrary.createAlbumAsync('Recent', {})
await MediaLibrary.addAssetsToAlbumAsync(allPhotos.assets, recentAlbum)
}
I can't get smart album too. I try to create a copy one.
but I thought this is not a efficiency way.
Related
Basically we might have some data like so
open class RealmCart : RealmObject() {
#PrimaryKey
var _id: String = UUID.randomUUID().toString()
var items: RealmList<RealmCartItem> = RealmList()
var discountCode: String? = null
var userId: String = ""
}
And we do not want people editing these by mistake. We have some failsafe like code owners, labels in the repo, but we also want to have a unit test that can also prevent a merge if the data is changed in any way (add, change, or remove data). Basically, we do not want any accidents, and people are not perfect.
What is the best way to go about such a thing?
This is what I ended up doing:
I created an extension function for my data models
fun RealmObject.testDeclaredFields(): List<String> {
val fields = this::class.java.fields.map { it.name }
return this::class.java.declaredFields
.map { it.name }
.filterNot { fields.contains(it) }
.sorted()
}
Basically this just gets the data model fields, excluding things like companion objects.
Then I was able to create a test simply like
class RealmMessageTest {
#Test
fun `RealmMessage fields match spec`() {
val item = RealmMessage().testDeclaredFields()
assertContentEquals(item, fieldSpec)
}
private val fieldSpec = listOf(
"_id",
"acknowledgeStatusValue",
"body",
"completed",
"createdAt",
"deliveryStatusValue",
"from",
"meta",
"organizationId",
"platforms",
"threadId",
"title"
).sorted()
}
Why do this? Sometimes when someone is making changes carelessly, they will not realize that they have added a field, changed a field, or removed an important field in a data model that is sync'd to the backend. This does not prevent the developer from changing it, but given that they need to now change it in two places, they will be more cognizant whether they need to make this change or not.
I noticed a lot of people questioned why you would need to do this. My answer is that, I work in a very large repo where newer developers edit this without a second thought. This is just to make them more cognizant of changes to these important models, before they break develop. There are code owners for the repo, but they may not always see these changes. It is just an extra precaution.
How about using a mechanism like githooks to prevent the editing of certain files from being committed?
I'm not familiar with githooks, so I can't show you exactly how to do it, but I think it would be good to prevent commits and inform the developer of the situation with an error message.
In Loopback it is easy to include relational objects when querying for data. For example, one can include all the comments that belong to a blog post in a single call using the include filter.
But in my case I want to get data that doesn't have a relation.
I have a User Detail page. On that page a user can choose a username and there's also a dropdown list where a user can choose from what country he is.
So from the client side I do something like:
Country.find().$promise.then(function(countryData) {
$scope.countries = countryData;
});
Player.find().$promise.then(function(playerData) {
$scope.player = playerData;
}
But what if I get more lists that I want to fill? Like, city, state, colors etc.
Then I'd have to make a lot of separate calls.
Is there a way to include all this data in one call, eventhough they have no relation? Something like this:
Player.find({ filter: { include: ["countries", "colors"] } }).$promise.then(function(data) {
// some stuff
}
You may want to try using the Where filter as documented here
An example of this for querying two specific things would be:
Post.find({where: {and: [{title: 'My Post'}, {content: 'Hello'}]}},
function (err, posts) {
...
});
You could create a remote method on one of your models that makes the calls internally and packages them back up for you.
Use some promise library if not using ES6 to wait for all and then return
Model.getAll = function(next) {
var promises = [];
promises.push(Model.app.models.Country.find());
promises.push(Model.app.models.Player.find());
promises.push(Model.app.models.Color.find());
Promise.all(promises)
.then(function(results) {
next(results);
});
}
/**
Register your remote method here
*/
You could create a remote method on one of your models that makes the calls internally and packages them back up for you.
Use some promise library if not using ES6 to wait for all and then return
Model.getAll = function(next) {
var promises = [];
promises.push(Model.app.models.Country.find());
promises.push(Model.app.models.Player.find());
promises.push(Model.app.models.Color.find());
Promise.all(promises)
.then(function(results) {
next(results);
});
}
/**
Register your remote method here
*/
I have problem and try with this solution but i get error "Failed with multiple errors, see details for more information.". It seems like there is bug on Loopback while using promise.all
How can I perform a where-in type query using ember-data?
Say I have a list of tags - how can I use the store to query the API to get all relevant records where they have one of the tags present?
Something like this:
return this.store.find('tags', {
name: {
"in": ['tag1', 'tag2', 'tag3']
}
})
There isn't built in support for something like that. And, I don't think its needed.
The result that you are after can be obtained in two steps.
return this.store.find('posts'); // I guess its a blog
and then in your controller you use a computed property
filteredPosts: function('model', function() {
var tags = ['tag1', 'tag2', 'tag3'];
return this.get('model').filter(function(post) {
if ( /* post has one of tags */ ) {
}
return false;
});
});
Update: What if there are tens of thousands of tags?!
Amother option is to send a list of tags as a single argument to the back end. You'll have to do a bit of data processing before sending a request and before querying.
return this.store.find('tags', {
tags: ['tag1', 'tag2', 'tag3'].join(', ')
})
In your API you'll know that the tags argument needs to be converted into an array before querying the DB.
So, this is better because you avoid the very expensive nested loop caused by the use of filter. (expensive !== bad, it has its benefits)
It is a concern to think that there will be tens of thousands of tags, if those are going to be available in your Ember app they'll have a big memory footprint and maybe something much more advanced is needed in terms of app design.
I am creating items on the fly via Sitecore Web Service. So far I can create the items from this function:
AddFromTemplate
And I also tried this link: http://blog.hansmelis.be/2012/05/29/sitecore-web-service-pitfalls/
But I am finding it hard to access the fields. So far here is my code:
public void CreateItemInSitecore(string getDayGuid, Oracle.DataAccess.Client.OracleDataReader reader)
{
if (getDayGuid != null)
{
var sitecoreService = new EverBankCMS.VisualSitecoreService();
var addItem = sitecoreService.AddFromTemplate(getDayGuid, templateIdRTT, "Testing", database, myCred);
var getChildren = sitecoreService.GetChildren(getDayGuid, database, myCred);
for (int i = 0; i < getChildren.ChildNodes.Count; i++)
{
if (getChildren.ChildNodes[i].InnerText.ToString() == "Testing")
{
var getItem = sitecoreService.GetItemFields(getChildren.ChildNodes[i].Attributes[0].Value, "en", "1", true, database, myCred);
string p = getChildren.ChildNodes[i].Attributes[0].Value;
}
}
}
}
So as you can see I am creating an Item and I want to access the Fields for that item.
I thought that GetItemFields will give me some value, but finding it hard to get it. Any clue?
My advice would be to not use the VSS (Visual Sitecore Service), but write your own service specifically for the thing you want it to do.
This way is usually more efficient because you can do exactly the thing you want, directly inside the service, instead of making a lot of calls to the VSS and handle your logic on the clientside.
For me, this has always been a better solution than using the VSS.
I am assuming you are looking to find out what the fields looks like and what the field IDs are.
You can call GetXml with the ID, it returns the item and all the versions and fields set in it, it won't show fields you haven't set.
I have a DS.Store which uses the DS.RESTAdapter and a ChatMessage object defined as such:
App.ChatMessage = DS.Model.extend({
contents: DS.attr('string'),
roomId: DS.attr('string')
});
Note that a chat message exists in a room (not shown for simplicity), so in my chat messages controller (which extends Ember.ArrayController) I only want to load messages for the room the user is currently in:
loadMessages: function(){
var room_id = App.getPath("current_room.id");
this.set("content", App.store.find(App.ChatMessage, {room_id: room_id});
}
This sets the content to a DS.AdapterPopulatedModelArray and my view happily displays all the returned chat messages in an {{#each}} block.
Now it comes to adding a new message, I have the following in the same controller:
postMessage: function(contents) {
var room_id = App.getPath("current_room.id");
App.store.createRecord(App.ChatMessage, {
contents: contents,
room_id: room_id
});
App.store.commit();
}
This initiates an ajax request to save the message on the server, all good so far, but it doesn't update the view. This pretty much makes sense as it's a filtered result and if I remove the room_id filter on App.store.find then it updates as expected.
Trying this.pushObject(message) with the message record returned from App.store.createRecord raises an error.
How do I manually add the item to the results? There doesn't seem to be a way as far as I can tell as both DS.AdapterPopulatedModelArray and DS.FilteredModelArray are immutable.
so couple of thoughts:
(reference: https://github.com/emberjs/data/issues/190)
how to listen for new records in the datastore
a normal Model.find()/findQuery() will return you an AdapterPopulatedModelArray, but that array will stand on its own... it wont know that anything new has been loaded into the database
a Model.find() with no params (or store.findAll()) will return you ALL records a FilteredModelArray, and ember-data will "register" it into a list, and any new records loaded into the database will be added to this array.
calling Model.filter(func) will give you back a FilteredModelArray, which is also registered with the store... and any new records in the store will cause ember-data to "updateModelArrays", meaning it will call your filter function with the new record, and if you return true, then it will stick it into your existing array.
SO WHAT I ENDED UP DOING: was immediately after creating the store, I call store.findAll(), which gives me back an array of all models for a type... and I attach that to the store... then anywhere else in the code, I can addArrayObservers to those lists.. something like:
App.MyModel = DS.Model.extend()
App.store = DS.Store.create()
App.store.allMyModels = App.store.findAll(App.MyModel)
//some other place in the app... a list controller perhaps
App.store.allMyModels.addArrayObserver({
arrayWillChange: function(arr, start, removeCount, addCount) {}
arrayDidChange: function(arr, start, removeCount, addCount) {}
})
how to push a model into one of those "immutable" arrays:
First to note: all Ember-Data Model instances (records) have a clientId property... which is a unique integer that identifies the model in the datastore cache whether or not it has a real server-id yet (example: right after doing a Model.createRecord).
so the AdapterPopulatedModelArray itself has a "content" property... which is an array of these clientId's... and when you iterate over the AdapterPopulatedModelArray, the iterator loops over these clientId's and hands you back the full model instances (records) that map to each clientId.
SO WHAT I HAVE DONE
(this doesn't mean it's "right"!) is to watch those findAll arrays, and push new clientId's into the content property of the AdapterPopulatedModelArray... SOMETHING LIKE:
arrayDidChange:function(arr, start, removeCount, addCount){
if (addCount == 0) {return;} //only care about adds right now... not removes...
arr.slice(start, start+addCount).forEach(function(item) {
//push clientId of this item into AdapterPopulatedModelArray content list
self.getPath('list.content').pushObject(item.get('clientId'));
});
}
what I can say is: "its working for me" :) will it break on the next ember-data update? totally possible
For those still struggling with this, you can get yourself a dynamic DS.FilteredArray instead of a static DS.AdapterPopulatedRecordArray by using the store.filter method. It takes 3 parameters: type, query and finally a filter callback.
loadMessages: function() {
var self = this,
room_id = App.getPath('current_room.id');
this.store.filter(App.ChatMessage, {room_id: room_id}, function (msg) {
return msg.get('roomId') === room_id;
})
// set content only after promise has resolved
.then(function (messages) {
self.set('content', messages);
});
}
You could also do this in the model hook without the extra clutter, because the model hook will accept a promise directly:
model: function() {
var self = this,
room_id = App.getPath("current_room.id");
return this.store.filter(App.ChatMessage, {room_id: room_id}, function (msg) {
return msg.get('roomId') === room_id;
});
}
My reading of the source (DS.Store.find) shows that what you'd actually be receiving in this instance is an AdapterPopulatedModelArray. A FilteredModelArray would auto-update as you create records. There are passing tests for this behaviour.
As of ember.data 1.13 store.filter was marked for removal, see the following ember blog post.
The feature was made available as a mixin. The GitHub page contains the following note
We recommend that you refactor away from using this addon. Below is a short guide for the three filter use scenarios and how to best refactor each.
Why? Simply put, it's far more performant (and not a memory leak) for you to manage filtering yourself via a specialized computed property tailored specifically for your needs