I just started working on a social network site using elgg framework. I want to do a simple query to the mysql database to get data out of it. How is the best way to connect to the database to do some simple queries on it?
Thanks
In Elgg, most database interaction is handled through the core database functions. Here's a link to the top level documentation article about the Elgg database system: http://docs.elgg.org/wiki/Engine/DataModel
In general, direct database interaction is discouraged, but if the data you need to access is outside of Elgg's tables, then you would want to look at the functions contained in /engine/lib/database.php. There you will find functions to execute queries, etc.
And of course, since you are in PHP, you can also do standard PHP database calls.
You can use the get_data($query) function provided by Elgg.
It will return the formatted result as an array
Related
I'm new to Azure and started an Azure Mobile App Quick-Start (.NET) project.
I'm studying on this blog wrote by Adrian Hall:
https://shellmonger.com/2016/05/09/30-days-of-zumo-v2-azure-mobile-apps-day-18-asp-net-authentication/. However, I've been confused by the explanation saying that:
Since this is Entity Framework, I would normally need to do an Entity
Framework Code First Migration to get that field onto my database. You
can find several walk-throughs of the process online. This isn’t an
Entity Framework blog, so I’ll leave that process to better minds than
mine. Just know that you have to deal with this aspect when using the
ASP.NET backend.
On the next page, https://shellmonger.com/2016/05/11/30-days-of-zumo-v2-azure-mobile-apps-day-19-asp-net-table-controllers/
The demonstration was using SQL syntax to create/manage the Azure SQL Database, such as: CREATE TABLE... and CREATE TRIGGER... and etc.
So, my question is, with either SQL(like the blog sample shown) or Entity Framework:1) Are they both able to do the exact same stuff?2) Should I only choose one of those methods only?
All the methods discussed (code first, model first, database first) provide you with a way to create a SQL database and update the data within it. The end result is the same - a database with data.
The method you pick tends to rely on where you prefer the 'intelligence' for your data to live - with the database or with the code.
Do you already have an existing database you'll be using?
Go database first, so you can automatically generate code and classes from the database.
Do you know SQL? Do you prefer to use your database for data only (i.e. no stored procedures or validating data inside the database)?
Go code first, you have full control of your model from the Code, and its a bit easier to keep databases in sync with your application.
There are a few more considerations that can help skew you to a different method. You can take a look at this blog post from Roland about the pros and cons of each approach.
There's also a StackOverflow thread that summarizes the differences between the methods.
I am working on a Livecode Aapplication. In this I need to use cloud base sqlite database. But I have not much knowledge about cloud base sqlite and how to implement it with Livecode Application. Could anyone explain to me, what is it and how can I use cloud base sqlite into Livecode?
Thanks
An SQLite database is just a file which resides in the file system of the device. So each device will have its own database with its own data. If you want to store data in the cloud you have to do something on the server side.
If you want to have a solution on the server you might want to go for a PHP script. PHP has sqlite access built in. However you can use other scripting languages as well.
Or on another line something like https://cloudant.com/ . But there the data is not stored in relational tables but as JSON objects. Access is as well through the http protocol (restful).
Related question
See also here How to retrieve data from a server
Suggestion
Please do not forget to use the search box of this web site. E.g. by searching for
sqlite cloud
you get
https://stackoverflow.com/search?q=sqlite+cloud
which has as the first answer
A: Can I use the SQLite as a db storage for cloud-based websites?
So your question needs to be more specific.
I'd like to know the best architecture.
We have a web application running different domains. Each domain has its own MySQL database but the db structure is the same for all of them.
We have a web application for the visible part of the application.
We have a dataLogic project
We have a dataEntities project
We have a dataAccess that contains only the methods to connect to the data base.
Before we called stored procedures on a database. But we had to change it because the performance was bad. Also, the problem was that every change we made we had in a stored procedure we had to copy to every database.
We are thinking in using a WebService to retrieve the data. Every domain can call the web service with a connection string and connect its database to retrieve data. This way when we change a SQL query we only have to compile the webService and change it, we don't have to change versions on multiples domains.
Also, what do you think about the SQL queries? Since we don't want to keep using stored procedures, what is the best way to do it? Directly from code?
Thanks
T
If you have multiple Database servers you will have to make Structural changes from one DB to another one way or another. There are many tools to change Database structures. These tools will look for differences between Schema, and will either generate the SQL code for you, or do the changes by itself (it depends a lot in the tool, there are powerful ones and not so powerful ones). Please do take a look at Toad for MySql. Now, for the Data changes, you may want to replicate the data from one Database to another. This is done through Replication.
We are thinking in using a WebService to retrieve the data. Every
domain can call the web service with a connection string and connect
its database to retrieve data.
This sounds like a good idea and since you already have "dataAccess" and "dataLogic" projects, it should not be too hard to make the services.
Also, what do you think about the SQL queries? Since we don't want to
keep using stored procedures, what is the best way to do it? Directly
from code?
I don't think it is a good practice to have the SQL queries directly into your code, but it depends in a lot of things, so I would suggest Stored Procedure vs Hard-Coding the queries, or LinQ (Entity Framework 4.1).
Good luck with your project and I will take a look at this thread frequently to see what you end up doing.
Have fun!
Hanlet
I'm looking for a connector for CKFinder that will enable it to use images stored in a SQL Server database as binary data. Google has turned up much and I was wondering if perhaps done anything like this and can refer me to some code?
If you are looking for an official one, there isn't a one and it looks like there will not be one. I created a trac ticket for this and it got rejected.
They are kind of right in that it's complicated to write a generic connector, because the backend could be MySQL, MSSQL, PostgreSQL, Oracle or any other SQL server running on any platform.
Backups and migrations aside, the best reason to use an SQL backend (at least for me) is for storing metadata and that would still require some custom SQL, because they could have no idea what I want to store and how.
I know this is not a solution so -1 if you feel like it. I have not found any instructions other than the official Server Side Integration guide mentioned in the ticket.
What you need is a handler. You are trying to read a binary image from a database and serve it to a user (or page - depending on the need).
You can see an example here:
http://weblogs.asp.net/cazzu/archive/2003/08/27/25568.aspx
It would help to know who -or what- is going to consume the image. Are you creating an image store? So at that point you would reference the Handler in your web.config and then create a Gridview or DataList that references the images and the Handler will render them for you at runtime.
I am trying to re-deploy my ASP.NET MVC3 application across several different environments and would like to try using SQL Azure. I'd like to use my existing LINQ structure and CreateDatabase to create these databases.
I am wondering how I can use CreateDatabase with SQL Azure since the USE statement doesn't work on the platform.
Please answer with any suggestions or if there might be a better way to do this.
http://msdn.microsoft.com/en-us/library/ee336274.aspx
Important: The CREATE DATABASE
statement must be the only statement
in a Transact-SQL batch. You must be
connected to the master database when
executing the CREATE DATABASE
statement.
You'll have to find a way to fit in this premise. Maybe it's not possible.
Have you actually tried executing this?
I've deployed nHibernate apps to SQL Azure - these apps call CREATE DATABASE somewhere inside the nHibernate layer and they work OK.
Best advice I can give is to try it - then come back with any specific errors you see. There may be some changes to make, but I think these should be small.