Re: [Zope] Zope, database field formats, output format of queries
Michael Schmidt writes: > On Mon, Jan 22, 2001 at 07:50:45PM +0100, Dieter Maurer wrote: > > What do you mean with a Zope based database? > > > > If you mean an external database, look for the datatypes and > > restrictions, they support for column values. SQL 3 may > > give you some of what you want. > > The wording of "Zope based database" may cause a misunderstanding, > what I really meant was a database behind Zope or a database > accessed through the interface of Zope. That is what I have called an external database. You may look what constraints the database allows to define for field values. > > Whether internal or external, you can control what goes through > > Zope to your database. You will probably need External Methods to > > get the full Python power, see "python.org" for documentation > > about Pythons vast library. > > You will be especially interested in the "re" module. > > It implements (Perl style) regular expressions. > > Do these also achieve error handling? No. They allow you to check whether the conditions are met. You are free to decide what you do in this case. The easiest thing is to raise an exception. This results in a preconfigured error response, which probably is not too useful. You may look for a recent message to this list about DTML contracts. It may give you most of what you want. Dieter ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope, database field formats, output format of queries
On Mon, Jan 22, 2001 at 07:50:45PM +0100, Dieter Maurer wrote: > Michael Schmidt writes: > > Can you create fields in a zope based database where you force > > the fields to accept e.g. only letters "M" or "W" or any other > > other combination of your choice? > What do you mean with a Zope based database? > > If you mean an external database, look for the datatypes and > restrictions, they support for column values. SQL 3 may > give you some of what you want. The wording of "Zope based database" may cause a misunderstanding, what I really meant was a database behind Zope or a database accessed through the interface of Zope. > Whether internal or external, you can control what goes through > Zope to your database. You will probably need External Methods to > get the full Python power, see "python.org" for documentation > about Pythons vast library. > You will be especially interested in the "re" module. > It implements (Perl style) regular expressions. Do these also achieve error handling? Shall say which part of the software presents error messages on the screen if e.g. the user inputs other values than "M" and "W" in the above question? Please excuse my ignorance, I'm new to Zope. Why I'm asking is that I'm thinking of recoding an application which I wrote years ago in the 4GL ZIM of Zanthe Information Technologies. That ZIM provided you with features I mentioned in the beginning and you hadn't to handle the error handling of wrong/unwanted input yourself, the underlying software did it for you. Would be fine if Zope could do the same or similar, can it? -- Michael Schmidt [EMAIL PROTECTED] MIRROR OF Ghostscript * X-Windows X11 * DJGPP * and more... ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Zope, database field formats, output format of queries
Michael Schmidt writes: > Can you create fields in a zope based database where you force > the fields to accept e.g. only letters "M" or "W" or any other > other combination of your choice? What do you mean with a Zope based database? If you mean an external database, look for the datatypes and restrictions, they support for column values. SQL 3 may give you some of what you want. Whether internal or external, you can control what goes through Zope to your database. You will probably need External Methods to get the full Python power, see "python.org" for documentation about Pythons vast library. You will be especially interested in the "re" module. It implements (Perl style) regular expressions. Dieter ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] Zope, database field formats, output format of queries
Hi, having searched through zope's website at the weekend and gone through the mailinglist archive I did not find stuff regarding the below in FAQs or HOWTOs. The general idea behind zope and the features of it are wonderful. I'm thinking of one application and would like to know: Can you create fields in a zope based database where you force the fields to accept e.g. only letters "M" or "W" or any other other combination of your choice? Can you setup database fields with a format e.g. of "9/99/9" where all 9s mean numeric input 0-9 and the slashs are always put at their fixed positions by the software when the field is displayed for input? Can you setup database fields with a date format e.g. DD/MM/ or MM/ which *force* the user to input values in that format? Can you output queries of databases in a format you can choose yourself, that the output fields may be incorporated into serial letters to be run by/through text-processing or office systems? Would be fine to get your responses. I appreciate your feedback. Have a nice day Michael -- Michael Schmidt [EMAIL PROTECTED] MIRROR OF Ghostscript * X-Windows X11 * DJGPP * and more... ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
