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| Taggnostr | hello | 09:04 |
|---|---|---|
| Taggnostr | is this the right place for tal-related questions? | 09:04 |
| Taggnostr | I have something like <tal:block tal:define="a_list python:..." tal:condition="python:a_list"> <form tal:attributes="action python:a_list[4]"> </tal:block>, but the <form> part is evaluated even when a_list == []. How can I avoid that? | 09:07 |
| Taggnostr | the idea is that the list doesn't have any element, the form shouldn't be printed, otherwise it should use the element [4] | 09:08 |
| zagy | Taggnostr: you're sure that the list is empty? | 09:16 |
| Taggnostr | yes, I think so | 09:16 |
| Taggnostr | is the code in the form supposed to be evaluated if the list is empty? | 09:17 |
| zagy | no | 09:17 |
| zagy | the condition looks okay | 09:17 |
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| zagy | but then, it'll still break if a_list has only 2 items | 09:18 |
| Taggnostr | ok, found the problem | 09:18 |
| Taggnostr | I had another block that was doing the same thing but outside the tal:block | 09:18 |
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| Taggnostr | is there a way to combine a tal:condition="foo/bar" with a tal:condition="python:a_list"? | 09:20 |
| zagy | python: a_list and path('foo/bar') maybe | 09:20 |
| Taggnostr | uhm, let me try | 09:21 |
| Taggnostr | a_list and foo.bar() works | 09:23 |
| Taggnostr | thanks again | 09:24 |
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| binjured | ello! zodb question: anybody know how, when using TransactionManager, i update another connection to the most recent state? | 17:18 |
| binjured | basically, i do conn.transaction_manager.commit() and i have another conn that needs the latest database. | 17:19 |
| binjured | (i was just using the standard transaction.commit() but it was resulting in exceptions about multiple calls to tpc_begin()) | 17:22 |
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| binjured | seems like i can't make more than one commit, period, even in the same thread. that seems strange... | 17:29 |
| binjured | hilariously, i can't find any documentation of somebody calling commit() more than once... | 17:34 |
| * mgedmin raises hand | 17:35 | |
| mgedmin | you can transaction.commit() as often as you like | 17:35 |
| mgedmin | those exceptions you mentioned -- weird, do you have a traceback? | 17:36 |
| mgedmin | what ZODB version was this | 17:36 |
| mgedmin | ? | 17:36 |
| binjured | mgedmin: i fixed the multi commits not working thing; not sure how. i'm using latest ZODB and my state was this: one DB, two connections, ... as soon as i try to commit with two connections open, it fails. if i make sure to only reuse the same open connection, it works fine (no tpc_begin() exception) | 17:38 |
| mgedmin | the traditional model is to use one connection+transaction per thread | 17:39 |
| mgedmin | I've played with multiple connections in the same thread only in my unit tests | 17:40 |
| binjured | mgedmin: that's where i was doing it, in fact ;) | 17:40 |
| mgedmin | can you pastebin some code that's problematic for you? | 17:40 |
| binjured | mgedmin: sure, let me make sure i can appropriate isolate it | 17:40 |
| binjured | mgedmin: there must be some weirdness happening because isolated it works fine; within the unittest framework it doesn't. don't want to send you on a wild goose chase, though. | 17:45 |
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| mgedmin | I've been doing this in zope 3, which has no "unit test framework" beyond what I specify in setUp/tearDown | 17:48 |
| mgedmin | (well, zope.testrunner has support for test layers that can share a single expensive setUp/tearDown function; I didn't use those for my *unit* tests, even when they edged toward integration test territory) | 17:48 |
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| Taggnostr | can I use tuple unpacking in tal:define? | 20:27 |
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| benji | Taggnostr: I don't think so. | 20:50 |
| Taggnostr | uhm, ok | 20:51 |
| Taggnostr | something like tal:define="foo_bar python:some_func(); foo python:foo_bar[0]; bar python:foo_bar[1]" should work though, shouldn't it? | 20:52 |
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| benji | yep | 21:04 |
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| benji | Taggnostr: another latent thought for you: if you control the implmentation of the function you're calling, I suggest returning a dict instead of a tuple; that way you can use tales traversal (foo/bar/baz) in your template | 21:20 |
| Taggnostr | how can I include html in a tal:define? I tried "issueurl python:'<a href="%s">%s</a>' % (issueid, issueid)" but the html is not interpreted and if I don't use entities I get an error | 21:20 |
| Taggnostr | benji, interesting | 21:21 |
| Taggnostr | I just used <a tal:attributes="href issueid" tal:content="issueid" /> twice | 21:27 |
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| malthe | does anyone know why the ``__getattr__`` method of UnauthorizedBinding has a default return value of ``None`` such that attribute lookup never fails? | 21:59 |
| mgedmin | Taggnostr, you can use tuple unpacking if you use Chameleon, but not if you use stock Zope Page Templates | 22:03 |
| mgedmin | although I'm not sure if that works only for tal:repeat, or for tal:define as well | 22:03 |
| mgedmin | Raymond Hettinger would suggest you use named tuples | 22:04 |
| Taggnostr | this is what I did: http://psf.upfronthosting.co.za/roundup/meta/file241/issue267-2.diff (all the tal is in the second chunk) | 22:04 |
| mgedmin | Taggnostr, first, I think you have to double semicolons to prevent tal:define from splitting that into multiple definitions | 22:05 |
| mgedmin | next, when you insert the formatted html, you need to use tal:replace="structure yourvariable" | 22:05 |
| mgedmin | third, just don't to that | 22:05 |
| mgedmin | you're opening yourself up to html injection if you abuse 'structure' | 22:06 |
| Taggnostr | I'm not even sure I know how to use structure | 22:06 |
| mgedmin | there's documentation out there somewhere | 22:06 |
| mgedmin | if you want to avoid duplication, use METAL macros | 22:06 |
| Taggnostr | I'm trying to keep things simple and idiomatic enough | 22:06 |
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| Taggnostr | (I'm fixing up a few things on a site, so I just know enough tal to make things work) | 22:09 |
| mgedmin | + issueid python:'issue%s' % issueid_action[0]; | 22:09 |
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| mgedmin | never mind | 22:09 |
| mgedmin | I was going to suggest string:issue${...} and realized the [0] makes things not as nice as I'd hoped | 22:10 |
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| Taggnostr | ok | 22:10 |
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