I am trying to write a custom FoxPro XBase database driver for Unix via Perl. I am currently able to perform CRUD on my .dbf and .cdx indices. The point of sale software my store uses has a FoxPro based file system. The master plan behind the idea is to have a proxy between the POS and my Magento web store. Allowing real time updates between the brick and mortar store and the ecommerce solution.
My question is fairly simple and straight forward. Whats the best way to dump my .cdx file contents so i can quickly look at the indices on the .dbf file. I am currently using XBases indexdump, but this is a slow and tedious process. The dump can be platform independent and can be purchasable software if needed. I am trying to accomplish this picture from MSDN
This from MSDN might help - it's not really a documented or discussed thing though, as someone is doing what you're doing there is no need to ever delve into the CDX structure.
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We store an manipulate geodata in postgresql(postgis) and use QGIS to view and edit.
My team and I need to build reports around that data. The reports are quite text heavy and need some good visual formatting. My colleagues are used to MSword or adobe indesign, so we agreed to use one of these two programs to build our final reports.
Our documents will include around 10 indesign/MSword tables. The data for these tables lives in dedicated views in the pg database. The Tables inside the reports should grow with the underlying data when I do my editing. So that everyone can focus on "their" work and to reduce data redundancy.
What would be the best way to do this?
I looked at some (ODBC) catalog plugins for indesign but i'm not
really sure if this is the way to go.
I'm no developer. I need to learn/look into the respective technologies involved anyway
so I wanted to define my tech-stack first (maybe hire someone to do it properly).
Maybe someone can give me a general idea / point me in the right direction with this.
Thanks!
I am setting up a simple online cms/editing system with a few multiple editors and would like a simple audit trail with diff, history, comparison and roll back functionality for small bits of text.
Our editors have gotten used to the benefits of using XML / Svn and I really would like to create a simple version of this in my system.
I realise I could probably create my own using say, a versions / history db with linked ids like this but I wondered if this is the best way or if there is an equivalent to an Svn api style interface available?
Btw I am totally new to Mongodb so go easy on me :-)
Cheers
Putting the data that create the database is not a good idea since it consits only of binary data. Additionally, this is rather huge in the beginnging since MongoDB allocates some disk space for it. So you have no benefit of putting the data folders under version controll.
If you want to track changes, you could export the data into its serialized form and store it in your VCS. If this is getting bigger, the advantage of the VCS may also drop since it will become very slow.
I assume you need to track the changes from within the data but since you deal with binary data, you are out of luck.
Hi i have configured the basics of cruise control to make releases, and automated nunit test using just MSBuild. Now i'm wondering if is possible to deploy/versioning databases with this?
I'm a beginner at CCNet .So if is possible some suggestions or tutorials (if there are) . Also if someone knows a free tool for database deployment/versioning let me know.. i will be grateful.
Thanks in advance
Hugh
It isn't free but SQL Source Control from RedGate can do what you're looking for, assuming it's a SQL Server database. It has a commandline interface that you can use in CCNet tasks. The easy approach of just migrating up is... easy, the changes are applied to your database schema / data. There was an issue with v2x of the tool that they've overcome with 3, which is that if you were to rename a table column then it would delete the column and create a new one with the right name. Obviously that's quite a big problem if you've got data you want to keep, so with v3 there's the concept of migrations and this allows you to specify alter scripts so instead of dropping the column you could script the change non-destructively.
As far as I know, at this time, they don't have anything that allows you to roll back your version.
Otherwise you could take a look at database migration tools, there seemed to be some promise for these in .Net at least. There is also this post that has some other tools (again for .net) and then there's this https://stackoverflow.com/search?q=database+migration+tool which is not restricted to any language but is general database migrations
If you're still looking for ways to version and migrate databases, one such tool is dbdeploy.net . I've hosted it on github after forking it and doing some work. Latest version is fully up to date and has some interesting features (done by someone who also uses it and sent a pull request).
I am a frequent R user (the very first program I turn on everyday when I back to office is RStudio and I spend >50% of time using R to do manipulation, tabulation and visualization of data). Sometimes I need to get involved in the data collection process of various research project, that is I need to develop a database with frontend to facilitate a clerk, or someone with little sense in programming/database to do the data entry job.
Since most of the data collection process involve manually inputting a questionnaire with more than 50 questions (100 - 200 columns when they presented as a spreadsheet), and there are relationship between different questionnaire (e.g. questionnaire A collect information from a shop, and questionnaire B collect information from the staff inside that shop), initially I use Access 2007 for the development. Access 2007 does the job, but only fairly.
My major complain on Access 2007 is as follow:
developing the front-end is painful: after using R for long, I really hate using mouse to drag and drop boxes, and enabling some certain functions of a checkbox
fair/poor multi-user support in my opinion: if I am the only one who use the Access 2007 program, I am fine with it, but things start to change now, we have multi-user logon to add/update/remove data at the same time, since the database is developed by someone else, I always fear that the data may get corrupted
keep "reinventing the wheel": the database developer build the user login module in Access 2007 all by himself, but should this be something of a standard that I can get it from somewhere?
auto-compress the database and the database is VANISHED: yes, I do mean vanished, I tried it once, and it freaks me out, now I backup the access database all the time
In summary, I lost faith in Access 2007 to build a decent database for several staff (at most 20) to do the data entry/query work. So I turn to other options.
I am thinking of something like a "web-based" replace of Access 2007, xataface comes to me at first, but it doesn't seem like a complete solution for me, it can fix some of my problem now, but may not be so for other problems.
Then I googled quite a bit: xataface -> nuBuilder -> Drupal -> Web Application Framework. Since I don't find an exact alternative for Access 2007. I guess Web Application Framework is a way out.
In the Web Application Framework domain, I come across many names: CakePHP, RoR, Django, since I am not exactly a program/database/web developer, and I know nothing about PHP, Python, Ruby. I don't know which one I should choose. Or should I learn the language before go to the framework?
Can anyone enlighten me here? I can provide additional information if needed. Thanks.
Try looking into VFront and nuBuilder. These allow you to build front ends to MySQL databases (i.e. forms, reports, etc.).
I am working on the developement of a application that will perform online backup of the files and folder in the PC, automatically or manually. Currently, I was keeping only the latest version of the file at the server.Now, I have to implement the versioning so that only the changes can be transfered to the online server and user must be able to download any of the available version of the file at Backup Server.
I need to perform Deduplication for this. Guys, though I am able to perform it using the fixed block size but facing an overhead of transferring the file having CRC information with each version backup.
I have never worked on such technology , so lacks in experience. I am eager to know is there any feasible method to embedd this functionality in the application without much pain. Is any third party tool would help to perform same thing? Please let me know?
Note: I am using FTP protocol to transfer the data.
There's a program called dump that does something similar, but it operates on filesystem blocks rather than files. rsync also may be of interest.
You will need to keep track of a large number of blocks with multiple versions and how they fit into the various versions of the original files, so you will need some kind of database to track this information, and an efficient way to query it to determine which blocks in a given file need to be transferred. Also note that adding something to the beginning of a file will cause all your blocks to be "new" if you use a naive blocking and diff scheme.
To do this well will be very complex. I highly recommend you thoroughly research already-available solutions, and if you decide you need to write your own, consider the benefits of their designs carefully.