I'm creating an app where users need to work with large databases. Rather than having the users download the data and populate an SQLite database on the client (which would take a long time), I'm hoping I can use downloadable, pre-populated databases.
I found cordova-sqlite-ext, which allows working with pre-populated databases, but SQLite files must be located in the www folder for this to work. Is it actually possible to download files to this folder in Ionic/Cordova (on non-rooted devices)?
It's always good practise to store your files in app's directory. Check this comment of mine and see if it helps you:
https://github.com/driftyco/ionic-native/issues/881#issuecomment-270832521
I had a requirement of downloading a zip file(with sqlite file in it), unzip the file, store the file in app's directory and query the DB. I was able to achieve it using plugins and works quite well.
Related
I want to uninstall Alfresco and re-install again, but I don't want to loose the accounts created in Alfresco and the other things. Is there any way to save this ?
Thanks!!
Let's assume that by re-installing you mean you want to start with a clean alfresco WAR and share WAR. If so, you can just shut down, remove the alfresco and share directories, then place the clean WARs in the $TOMCAT_HOME/webapps directory. If you had any AMPs deployed, use MMT to re-install those. Then, restart Tomcat. The content is in the content store directory and the metadata is in the database, so you can start over with fresh WARs without losing any data.
If you mean you want to delete everything in $ALFRESCO_HOME but you want to save your data, the easiest thing to do is to dump your database and tar up your content store. Then you can completely blow away your installation, and after reinstalling, you can load your database and un-tar your content store.
If you are trying to blow away some, but not all of your data, you'll have to export what you want to keep. You might go look at the docs on ACP files as one possible approach. Or you could use something like CMIS to write an exporter.
For users, specifically, it is often helpful to use an LDAP directory instead of managing them in Alfresco directly. That way you can completely start over and Alfresco will simply synchronize your users from LDAP.
If you don't want to use LDAP an alternative is to have a simple CSV file with user account data. After starting your repository for the first time you can re-import your users from the CSV file.
i'm asp.net beginner and currently working in "upload download file" project with asp.net and vb.net as code behind language (like skydrive's web).
what i'm want ask is about upload file in server, must we store path file, size, accessed or created date into database? as we know we can use directory listing in system.io.
Thanks for your help.
You definetly want to store the path of the file. You want a way to find the file ;) Maybe later you will have multiple servers, replication or other fancy things.
For the rest, it depends a bit on the type of website. If it's going to get high traffic then store it in the database, this will limit the number of IO call (very slow). Also, it'll be a lot easier to handle sorting and queries. (sort by date, pull only the read onyl files, ...).
Database will also help if you want to show history or statistique.
You can save file in some directory and can save path of that file in database. You can also store size and created date of that file in DB. But storing a file in DB is a bit difficult. Rather than save file in Directory and save path of that file in DB
you could store the file information in a database to built some extra features like "avoid storing duplicate files", because you are having a faster search in the database! if you search the filesystem always a recursive function call get started
I'm designing a website that will let the user synchronize a local folder to an online folder (Kinda like dropbox).
I'm trying to find a way to avoid developing a local tool to do the download and synchronization. And do it somehow online.
Is it possible to download multiple files in a certain directory tree?
Can a website have free write access to local directories?
A zip file is not an option, since the file batch could get pretty big.
EDIT: Synchronization shouldn't occur periodically. Just when the user logs in the website.
My recommendation is to use something like WebDAV then see here
I'm trying to compute statistics for data held in an Access .mdb database. In order to avoid interfering with the live database, I'm working from a copy which I made by simply using copy-paste in Windows Explorer. The copy resides in the same directory, but with a different name.
I'm using R and RODBC to connect to the copy of the file. The strange thing is that new data that is being updated on the original live database is appearing in my queries. This is despite the file timestamps of the copy not changing at all. It is also causing some slowdown in the live database.
My understanding is that the .mdb files are standalone, or is this not the case? Should I have copied the database in a different way?
It seems that you may have copied the front-end of a front-end / back-end set up. The back-end is where data is held and tables are linked to a front-end to hold forms etc. Copying a front-end copies the back-end links, so the data is live.
I have a directory only backup of a previous server that hosted multiple sites. I had access to a few .sql backups for our databases, but there were some that had not been backed up in that fashion. I located the .MYD,.frm, and .MYI files for the tables in my db in the var/lib/mysql/db_name directory.
I would like to know if there is a way to get the data from these files and move them into the new existing mysql installation? I tried copying the files from the db folder to a db folder with the exact same name, but I still get a "Can't find db_name/table_name.frm" error when trying to access any of the tables. They do show up in phpmyadmin table list, the error comes up when trying to access the tables.
Is this possible? If so, how do I go about taking these table files and turning them into use-able data?
I am sorry if my question or explanation doesn't make any sense. This is part of an ongoing 11+ hour emergency server recovery project that got sprung on me today, so my brain is fried. I will answer any questions necessary.
Have you checked that the files in /var/lib/mysql/db_name/ are owned by mysql and not root? Usually copying the files in should 'just work' (certainly it has and does for me). I assume you're using the same or very similar version of MySQL?
You really need to restore everything relating to that database, including also the matching 'mysql' database for your previous installation.