Newbie at Qt looking for some advice
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hi, its pretty good description.
One important question is.
Will more than one "head" make reviews at the same time ?
That is - multiple copies of the program run on different computers and access and change that
data at the same time?
If yes, you (might) need a database server.How good are you with SQL ? (if I may ask)
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Hi,
The was I was planning it is that it would be 1 "head" per computer. This means the program will not be pre-made, as such, with any information in it and the "head" will fill in the information for the members of staff they supervise the first time they open the program. Because of this, each head will have a the same program on their computer but they will not share data and will each be filled in with different members of staff's information.
In the class we briefly touched on some SQL , probably very basic stuff, so I'm quite new to that as well. I made notes on it, and I'm sure there will be some tutorials out there somewhere I can use but I wouldn't say I'm confident.
As an extra, I finally got my head around why I would like the tables to be linked relationally:
1 member of staff record (parent) will be linked to all observation/QA records on separate (child) tables that involve them so. This hopefully makes sense, but we can cross that bridge in a bit.I really appreciate your willing to help me, as I am at quite a confused loss!
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Doing so you are going to run into data duplication (e.g. multiple copies of the same user with all the problems that come with entering the same names multiple times) and also problem of synchronization, retrieval of data etc.
Even if it's not the easiest path, you should consider the use of a SQL server (PostgreSQL, MySQL or MariaDB) It's not overly complicated to setup though.
If you have one at hand, you should talk with a DB admin, he can help you get the database schema correctly.
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@SGaist Thanks for the suggestions.
My program will not have Head of faculty information stored, so will only be teacher information and observation records. Because of this, I hopefully will result in 1 user per instance of the program and (if I understand your previous comment correctly, sorry if I didn't) then does not have any of the problems you mentioned.
I'm starting to understand what I will need to do for the project, but I'm still not confident.
I would like to make a start and see where it gets me so I will use ms access instead of SQLite manager, but cannot find how to link Qt to the access database. I keep hearing about the ODBC driver, but that means nothing to me. Any chance you know a good explanation for this you could send me?
Thanks very much!
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Hi.
If you are really really sure the heads do not expect to share staff info and
the project is a personal tool for each and no reports is shared then you can
make it a single user app. but beware of all what @SGaist mentions as you will get
these problems if the heads try to share any of the data.Before digging into what data base to use. May I suggest you write up all
information you wish to record. spend some time thinking about what you need to store.
write it all up. You are going to need this a lot for creating the database. so
don't start coding before you have full list of what data.ODBC driver.
This is a common driver that give the same set of functions to talk to a database system.
Normally, each system has its on functions. BUt if it support ODBC, it means its
able to be handled the same regardless of the actual database.
https://en.wikipedia.org/wiki/Open_Database_ConnectivityLast time i used ACCESS database, it was very slow over network.
So find out if you want single user or multiuser.
then choose DB system.
Most likely the heads expects to share staff info.
So multi user. and u need something like PostgreSQL -
@mrjj That makes a lot of sense, thanks :)
Is it possible for the data to be printed, ie the whole gui page showing the reviews to be printed?
If not, then I will probably look into the PostgreSQL and making the program multi user
In regards to the information I want to record, I have already done that for the teacher info, Observations and QA just incase I am going to use both. Because of this, I am quite ready to start coding, but thanks for checking that I had that :)
Any idea where I should start looking if I want to use PostgreSQL and can that link tables relationally?
(Sorry if I'm sounding a bit obsessed with linking tables!)
Thank you all very much!
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@joeshmo
1: Is it possible for the data to be printed, ie the whole gui page showing the reviews to be printed?
well yes, you can render controls to a paper page but normally you would create a pdf or
print out the data in some other way. like a report.
Else print will be like a screenshot. But possible.2: Any idea where I should start looking if I want to use PostgreSQL and can that link tables relationally?
this is good first start
https://forum.qt.io/topic/33926/postgresql-and-trying-to-connect-using-qt/20
Note: version are bit older, so adjust names.
and also
https://www.youtube.com/watch?v=3XE2bKUAxfw3:(Sorry if I'm sounding a bit obsessed with linking tables!)
Its ok. you will need that a lot.
When you reference something from one table to another you use
keys. that is your linking.
http://www.tutorialspoint.com/sql/sql-foreign-key.htmHow much time do you have for the project?
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@mrjj I have until about easter time 2016 for the project to be completed.
I have written work relating to the project too, so it does not need to be top of the range, just something that is easy to navigate and does what I want it to do.
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@joeshmo
Ok. well you should have time to make it multi user if needed then.If the project are really going to be used multiuser,you need a pc that can act as server.
Have you considered a web service instead of qt client application. ?
something like
https://www.djangoproject.com/start/overview/If you really need to make it a real multi user app.
That way maintenance etc is lighter. -
@joeshmo
Hi , you can use ms access inside your c++ C# or whatever language projects. Microsoft gives it away I think to encourage people to use it over MySql ,Oracle and others. Recently I used ms access for my local database ,and used MySQL as a remote database running on a Linux machine . -
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You would be using ACCES via ODBC
here they talk about that
http://stackoverflow.com/questions/22552302/how-to-use-m-s-access-in-qt
