If necessary, update pydal
Explanation: It sounds like an instance of iteritems is not being
converted to python 3 - I think that happens in pydal._compat.py.
If that is not the problem, continue...
Check value of: type(c.keywords)
Check value of: print(list(c.keywords))
If type(c.keywords) is map, then surely this should work:
response.meta.keywords = ', '.join( list( c.keywords) )
My idea would be to convert c.keywords to a simple string, then
concatenate it to response.meta.keywords afterwards.
General info: response.meta is a Storage object which is really just a
special web2py dict.
In other words, this: response.meta.keywords = 'my key word string'
would be equivalent to this: response.meta['keywords'] = 'my key word
string'
On Thursday, 3 September 2020 at 12:14:45 UTC+1 lucas wrote:
> ok, i've tried what you suggested but on response.meta.keywords:
>
> list(response.meta.keywords).append(', '+c.keywords if c.keywords
> else "")
>
> which does not except out, but when i view the final html code in the
> browser, web2py still returns:
>
> <meta name="keywords" content="<map object at 0x7f42e140f9d0>">
>
> on the new centos 8.2 server. BUT on the old centos 7.6 it returns the
> proper string of keywords.
>
> On Thursday, September 3, 2020 at 6:52:07 AM UTC-4 lucas wrote:
>
>> maybe i didn't explain what happened here. i've been running web2py on a
>> centos 7.6 server with python 2.7.5. i created a brand new server with
>> centos 8.2 with python 3.8.0. both servers are running web2py 2.20.4.
>> when i copy the application code from the centos 7.6 to the new centos 8.2
>> and run the code the application excepts out on the response.meta.keywords
>> = "some string" because its of <type 'map'> whereas on the centos 7.6 is of
>> <type 'list'> where the += "some string" appends to the list.
>>
>> it doesn't make sense because web2py is the same version on both servers
>> and for the object to change type so much is confusing. and map isn't a
>> real thing in python because when i read about it, it always points to type
>> dict.
>>
>> On Wednesday, September 2, 2020 at 10:58:00 PM UTC-4 lucas wrote:
>>
>>>
>>> no, i tried all those tests. when i simply do return
>>> BODY(type(response.meta.keywords)) it returns 'map'.
>>> On Wednesday, September 2, 2020 at 7:07:13 PM UTC-4 villas wrote:
>>>
>>>> I may have an older version, but I imagine that response.meta.keywords
>>>> is still just a string.
>>>> It may be c.keywords is type map?
>>>> I think type map would be an iterator which you can convert to a list.
>>>> Once you've used it, it's gone.
>>>>
>>>> So, did you try something like on e of these?:
>>>> response.meta.keywords = ', '.join( c.keyword) ) # if it's a list
>>>> or
>>>> response.meta.keywords = ', '.join( list( c.keywords) ) # convert
>>>> map to a list
>>>> or
>>>> response.meta.keywords = ', '.join( [ i[0] for i in list(c.keyword)]
>>>> ) # it may be a list of lists
>>>>
>>>> Sorry, but as you can see, my motto is simply 'try everything until it
>>>> works'!
>>>> You may wish to read up about the map function and iterators if this is
>>>> a new concept.
>>>>
>>>>
>>>> On Wednesday, 2 September 2020 at 16:16:09 UTC+1 lucas wrote:
>>>>
>>>>> very simply, i'm trying to add keywords of type string to the
>>>>> response.meta.keywords, which used to be of type string and now its of
>>>>> type
>>>>> map, which exceptions out as above.
>>>>>
>>>>> i've also tried appending to the list like
>>>>> "response.meta.keywords.append("some string here")" and I've tried
>>>>> treating
>>>>> like a dictionary like, "response.meta.keywords['variable name'] =
>>>>> "keyword
>>>>> string"" and both blew up with an exception also. very strange change of
>>>>> response.meta.keywords.
>>>>>
>>>>> On Wednesday, September 2, 2020 at 10:39:37 AM UTC-4 villas wrote:
>>>>>
>>>>>> I'm not sure what you are doing exactly but you seem to have created
>>>>>> a map iterator. Maybe you could convert that to a list? You might be
>>>>>> able
>>>>>> to work with it more easily. Something like this:
>>>>>> list( response.meta.keywords )
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Wednesday, 2 September 2020 at 12:52:27 UTC+1 lucas wrote:
>>>>>>
>>>>>>> in fact, when i inspect the head of the final html in the browser,
>>>>>>> w2p doesn't return a string at all, in fact it returns a reference to
>>>>>>> an
>>>>>>> object:
>>>>>>>
>>>>>>> <meta name="keywords" content="<map object at 0x7f693a6a98e0>">
>>>>>>>
>>>>>>> On Tuesday, September 1, 2020 at 10:03:28 PM UTC-4 lucas wrote:
>>>>>>>
>>>>>>>> hello one and all,
>>>>>>>>
>>>>>>>> its been a while since i've been on here. that is a good sign for
>>>>>>>> my sites have been working great. love python and web2py. ok, so,
>>>>>>>> i'm
>>>>>>>> slowing porting to python 3.8 from 2.7. still constant on web2py
>>>>>>>> 2.20.4.
>>>>>>>> do i had some code under a controller that looks like:
>>>>>>>>
>>>>>>>> response.meta.keywords += (', '+c.keywords if c.keywords else "")
>>>>>>>>
>>>>>>>> and it errors saying that "TypeError(unsupported operand type(s)
>>>>>>>> for +=: 'map' and 'str')". after a bit of investigation i found
>>>>>>>> that response.meta.keywords is of type "map" instead of it used to
>>>>>>>> being a
>>>>>>>> string. i'm obviously concatenating strings above.
>>>>>>>>
>>>>>>>> what the heck is type "map" and how's that work with keywords?
>>>>>>>>
>>>>>>>> lucas
>>>>>>>>
>>>>>>>
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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