hi friend
can any one tell me that i have web server there i have create the database for store some value for registration form the value was save in webserver this is working good
but now that data coming in json format and now i have fetch json value and save in to the local database which is same as the webserverdata base both the side ssame table and same colume name is there how can i do this
and how to writ the query for this sitution help me
Various JSON parsers exist for objective c. You'll have to pass the data to a library or to javascript in a webview to extract it. Here is a google library:
http://code.google.com/p/json-framework/
If you need help with saving the data, I say with no snideness whatsoever that you should read the manual:
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/CoreData/Articles/cdUsingMOM.html
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I am trying utilise Django REST APIs to insert data into the database, instead of the direct write. I've been able to read JSON data using the tRESTClient component but I am not too sure about the insertion/POST. Could someone point me to the components (and relation) that I should use?
The current job that I have is mostly:
Read data from raw file -> tMap -> DB
and I wish to do something like:
Read data from raw file -> tMap -> (pass on data to REST endpoint via POST)
Used the tRestClient component after my tMap and I could see the records getting inserted into the DB but all of them are without any data. Strangely nowhere I was asked to specify the JASON tree. The number of records getting inserted are equal to rows being read from raw file so at least something is right. But I couldn't locate the menu/options to specify which data element read from the raw file should tag to which JASON element.
How do I specify the data to JSON mapping?
PS: I realise that this might not be the most efficient way to ingest data but that's what the business wants since it brings in an additional layer of control.
I have some data like pictures, stored in Core Data as binary data and marked as "Allows External Storage". I'd like to write this data to the CloudKit. Is it possible to get URLs for this data and pass it to CKAsset, or transform somehow this data to CKAsset without double writing this data to some temporary files? Thank you.
Accessing external binary data directly is not supported and there's no API for it. Unofficially it's not hard to figure out what directory the files are stored in, but it's not useful because
Filenames are UUIDs, and there's no documented way to link a managed object to a UUID, so you don't know which file to use.
The option is to allow external storage, so there's no guarantee that an external file exists. Some instances may not use external storage.
I'm not sure what CKAsset requires but you'll have to look up the binary data via the managed object first.
I have a ready script which sends email using PL/SQL. It has been stored in a procedure and when it is called by passing proper parameters, it sends email.
Now, I need to pick up a file from the disc and send it as an attachment. I have seen many examples where the data is stored in BLOB and comes from the DB. In my case it is not from DB instead it is a file on the server/disc.
How to achieve this ?
Use UTL_FILE to read data from disk.
You can find a good example of how to use it to load an entire file into a BLOB in the Alexandria PL/SQL Library. Look at (or just copy!) the code from file_util_pkg.get_blob_from_file.
ORACLE DIRECTORIES can be used to achieve this.
link to a full email/smtp example
I want to use Tarantool database for logging user activity.
Are there any out of the box solutions to create web dashboard with nice charts based on the collected data?
A long time ago, using an old-old version of tarantool I've created a draft of tarbon - time-series database, with carbon-cache identical interface.
Since that time the protocol have changed, but the generic idea still the same: use spaces to store data, compact data organization and correct indexes to access spaces as time-series rows and lua for preparing resulting jsons.
That solution was perfect in performance (either on reads or on writes), but that old version lacks disk storage and without disk I was very limited to metrics capacity.
Tarantool has embedded lua language so u could generate json from your data and use any charting library. For example D3.js has method to load json directly from url.
d3.json(url[, callback])
Creates a request for the JSON file at the specified url with the mime type "application/json". If a callback is specified, the request is immediately issued with the GET method, and the callback will be invoked asynchronously when the file is loaded or the request fails; the callback is invoked with two arguments: the error, if any, and the parsed JSON. The parsed JSON is undefined if an error occurs. If no callback is specified, the returned request can be issued using xhr.get or similar, and handled using xhr.on.
You also could look at c3.js simple facade for d3
I want to access a webservice to fetch alot of data (e.g. product lists/details/search results) and display this.
Are there any best practices for this type of operations?
Performance-wise, is there any better way than retrieving, parsing and displaying text data on each request and maybe load images in the background? Are there any wise caching policies which may be applied?
If I were doing something like this from the ground-up, here's what I'd do:
Have the web site post all the data in XML. Except for maybe the pictures - just have an XML field specify a URL for each picture. So, for example, say I was doing a product list.
Use NSXMLParser to both fetch and parse the XML data.
Use a separate NSData dataWithContentsOfURL: call to fetch the contents of each image, with the URL from the XML data
Write the XML data, (and the NSData image) to a database table with CoreData. Add a indexed timestamp field to the table.
You can now use the timestamp field to keep the newest "x" records in the database - and can purge the older ones if/when you need to.
Use the contents of the database table to populate a UITableView - or however else you want to present.
Make some sort of "next", "prev" or "update" fields in the UITableView to get more data from the web, if you need to display more data than is what is cached - or you want to update the data in the cache.