Can I save data into the realm without making a model or object file and also retrieve from it using swift?
I don't believe this is possible. Realm models define the schema for that object type, and everything going into Realm needs to have a schema.
If you haven't gone over the docs, the Realm academy page could be a good place to start: Realm Academy
It's hard to say without more information in the original question, but if you want to skip defining the model because it's a one-off piece of data, you can consider storing it in UserDefaults. But there are caveats with that, and one of them is that values stored in UserDefaults are not secure. You should never store sensitive information there. Also, UserDefaults can only store certain data types, and storing too much data in UserDefaults can slow down the launch of your app.
More info on user defaults.
Related
trying to understand the concept for Photos/Photos.h framework.
my goal is:
write captured video url (or asset) to app's "userDefaults".
read from "userDefaults", & fetch each saved asset data (thumbnail & url)
Since you're not providing any code (nor asking for any), I can help sort some of this out for you -- but you need to study a bit more before you can put it all together. Especially if you think you've asked a question which has one simple correct answer.
UserDefaults is not a good place to store an image. Images are big. (You should look at Apple's documentation of what UserDefaults is for/how it's intended use).
UserDefaults
There's more than one place to store images. Do you want the system to delete them if you start running out of memory? Then it belongs in cache:
let cachesPath = NSSearchPathForDirectoriesInDomains(.cachesDirectory, .userDomainMask, true).last!
Do you want to depend on it being around the next time the app is run? There is a standard place for that as well:
let userDocumentsFolder = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
Do you want iTunes to back up the images for you automatically? It expects files to be in a certain place for automatic backup. Do you have a way to keep track of where it is (the path to the file can change if the app is re-run). For that you might require persistent storage, so CoreData or Realm might be an option for you. Or you could scan your directory and create a list of files you've already saved. Then you'll need a way to select the correct one. (What did you call it? Should the user select it?)
Apple has very clearly written and useful documentation on access to the Photos library and using PHAssets. Here's just one example:
PHAsset - Photos
There are a lot of talented people on this site, and they are willing to help you, but you need to do your homework before coming here.
I recommend you read these linked documents, start writing some code, and if you run into problems please come back and ask any specific question you have about any specific problem you've encountered. Include the code which causes the problem, as well as the exact error message you are getting. We will be glad to help.
I can import Comma Separated Values (CSV) data through the admin pages, into most models. This process handles the external IDs so that the data can be added to or amended as appropriate in later CSV imports. This is a manial action.
Through the API, the same records can be created and amended, and external IDs can be set. This, however, requires a lot of the logic that would otherwise be handled by the CSV importer to be coded by hand, in the external application that uses the API to push in data. Pushing data through the API can be automated.
Is there a way the API can be used (so no changes need to be made to code within Odoo) to push CSV data (so the logic for insert/update/relationships/external IDs/ etc. is handled by Odoo)? This would be a kind of hybrid approach, and I am trying to avoid the need to create import modules within Odoo.
Edit: the "external ID" is often called the "XML ID". I think it is a terminology that has stuck from earlier versions of OpenERP, rather than having anything specific to do with XML.
Edit
This page describes a load() function that pushes CSV-like data through a pipeline to load it into the system:
http://openerp-server.readthedocs.org/en/latest/06_misc_import.html
I can't see how to translate the summary on that page into an operation through the API, if indeed that is possible. I'm guessing I will need the interface (entry point), model, method (load(), probably), and some additional parameters, but the details are beyond me.
The answer is kind of "yes".
The load() method can be used against any model to load data. This method takes data in the same structure as a CSV file would provide.
The first parameter is an array of field names, like the column headings on a CSV import.
The second parameter is an array of records. Each record is an array of values matching each field.
The API will return a list of errors where they are catered for by OpenERP. Many errors, however, just result in database exceptions on OpenERP and so need to be picked up as an API failure. This is largely because the OpenERP API is not designed as a generic API, but as a part of the GUI, and so the data sent to the API is very much bound to the current state of the application through that GUI. In other words, invalid data will seldom find its way to the API using the OpenERP GUI.
I have wrapped the loader functionality, catching errors and exceptions, in my PHP OpenERP API library here:
https://github.com/academe/openerpapi/blob/master/src/App/Loader.php
Hopefully that will be useful to others too.
I think the answer is "no".
However, this technique has been explained to me:
Create a module with little in it but CSV files for importing.
Install the module.
When a new CSV file needs to be imported, transfer it into the module (FTP or similar).
Once transferred, run the update() method for the module. This can be done through the API.
The update method will scan and load all the CSV files set up within the module. Care needs to be taken to make sure only one upload/update transaction will be run at any time.
I'll post additional details here when I have got this working, or will happily accept an alternate answer if there is a better way to handle this.
I am saving user info into NSUserDefaults with key 'userInfo' right now.
and when app is launched, I check if 'userInfo' exists and switch the flow.
It works very well, but is it a bad habit to directly access to NSUserDefaults
each time I need user's info ?
Is it better to save user info when app is launced to my custom class?
If so, can you tell me the reason?
Access NSUserDefaults when you need them. If you save the user data in your class - I assume you mean in memory - you are blocking valuable memory. Depending on the size of your user data that might be an issue. On the other hand NSUserDefaults access is fast and inexpensive.
I need a UI to manage all app sessions. How could I retrive data from foreign sessions? Im interested in getting data set bysetState` function during other users login.
I'm using CDbHttpSession for storing sessions in DB
So, i found answer, but it isnt good in my opinion. But maybe it will be helpfull for others. Yii stores data in session table using php built in session serialization method (it isnt regular serialize function). And only way that i found to work with it is suggested on the php session_decode manual page in the comments.
So, I have a bunch of HTML is being stored in a SQLite database, and they link back and forth amongst themselves. When a user clicks to follow a link, that request needs to be serviced by pulling the appropriate HTML out of the database. This could result in needing to load images, which are also being stored in the database (this is a future thing; there are no images yet, but I'd like to be able to use them). I've looked through the WebKit documentation, but can't quite figure out how to make this happen. I've mostly looked at WebFrameLoadDelegate and WebResourceLoadDelegate, but I didn't see one that would let me catch the request, grab the appropriate content, and then send that in a response.
Ideas? I'm pretty new to Objective-C and Cocoa, but I think I'm mostly getting the hang of things.
How do the pages which are stored in the database link to each other? It is probably easiest if they use some sort of customer URL scheme to start with.
The approach I would use is to implement
-webView:resource:willSendRequest:redirectResponse:fromDataSource:
in your resource load delegate. If the request is for a resource that is actually located in your database, return a new[1] NSURLRequest which uses a custom URL protocol which points to the database resource:
x-my-scheme:///table/row
[1] Unless you are already linking amongst your resources with the custom URL scheme - then you can skip this step.
Then, implement a custom NSURLProtocol for x-my-scheme which knows how to retrieve the data from the database. The PictureBrowser sample gives a simple example of how this is done.