Re: [Zope] if object does not exist in python

2006-12-14 Thread Chris Withers 

Garito wrote:

Checks for named object inside the container that the script is in.
  

hasattr(container, 'id')


NO!

This is bad for two reasons:

1. It'll acquire id from other places

2. It'll swallow any exceptions found in trying to get hold of 'id', 
inlcuding ConflictErrors, which is "bad" :-S


cheers,

Chris

--
Simplistix - Content Management, Zope & Python Consulting
   - http://www.simplistix.co.uk

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Re: [Zope] if object does not exist in python

2006-12-13 Thread Jonathan 


- Original Message - 
From: "Andrew Milton" <[EMAIL PROTECTED]>

To: "Garito" <[EMAIL PROTECTED]>
Cc: "zope" 
Sent: Wednesday, December 13, 2006 9:40 AM
Subject: Re: [Zope] if object does not exist in python



+---[ Garito ]--
| Andrew Milton escribi?:
| >+---[ David Bear ]--
| >| Can anyone show me code examples of a script that checks for the
| >| existences of a named object?
| >
| >if namedObject in container.objectIds():
| >  # object exists
| >else:
| >  # doesn't
| >
| >
| >Checks for named object inside the container that the script is in.
| >
| >  
| hasattr(container, 'id')


That will acquire...


And the ever popular:

obj = context.restrictedTraverse('/path/to/object/objId', None)
if obj is None:
   # object not found
else:
   # object exists



Jonathan

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Re: [Zope] if object does not exist in python

2006-12-13 Thread Andrew Milton 
+---[ Garito ]--
| Andrew Milton escribi?:
| >+---[ David Bear ]--
| >| Can anyone show me code examples of a script that checks for the
| >| existences of a named object?
| >
| >if namedObject in container.objectIds():
| >  # object exists
| >else:
| >  # doesn't
| >
| >
| >Checks for named object inside the container that the script is in.
| >
| >  
| hasattr(container, 'id')

That will acquire...

-- 
Andrew Milton
[EMAIL PROTECTED]
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Re: [Zope] if object does not exist in python

2006-12-13 Thread Garito 

Andrew Milton escribió:

+---[ David Bear ]--
| Can anyone show me code examples of a script that checks for the
| existences of a named object?

if namedObject in container.objectIds():
  # object exists
else:
  # doesn't


Checks for named object inside the container that the script is in.

  

hasattr(container, 'id')

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Re: [Zope] if object does not exist in python

2006-12-12 Thread Andrew Milton 
+---[ David Bear ]--
| Can anyone show me code examples of a script that checks for the
| existences of a named object?

if namedObject in container.objectIds():
  # object exists
else:
  # doesn't


Checks for named object inside the container that the script is in.

-- 
Andrew Milton
[EMAIL PROTECTED]
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