You have to use reload.to_a to work with everything (enumerable methods for eg.).
Can we have a method that does this and make it part of the stable API, please? That's what #all has always done and it's pretty basic functionality. On 1/03/2013, at 01:42 , Rafael Mendonça França <[email protected]> wrote: > #reload doesn't work to you? > > > Rafael Mendonça França > http://twitter.com/rafaelfranca > https://github.com/rafaelfranca > > > On Thu, Feb 28, 2013 at 2:30 AM, Will Bryant <[email protected]> wrote: > The thing that's got worse is having to write different code for associations > vs. relations. Currently #all will behave exactly the same way on both, > which is very useful because you can write code on a model class that works > the same way whether it's working on a global scope or just an association. > > BTW, the per-request caching mechanism is query caching, which is different > to the loadedness caching that associations do, which is the reason to_a is > not a consistent replacement for #all, and why I want at least a method that > always does a query (#query, for example). > > The query caching mechanism has other effects but it always returns a fresh > set of objects and is also only on when you expect it, so it is easier to > control. > > > On 28/02/2013, at 18:19 , Jarrett Meyer <[email protected]> wrote: > >> http://edgeguides.rubyonrails.org/association_basics.html#controlling-caching >> >> It looks like clearing the cache and going to the DB is quite easy. I don't >> believe your statement is accurate that you can't force a fresh, enumerated >> query. And the cache is reset per request, which is a very short time. The >> only thing I can think of that would require this kind of functionality is a >> database trigger or other out-of-sequence activity. >> >> >> On Feb 27, 2013, at 11:38 PM, Will Bryant <[email protected]> wrote: >> >>> Hi Jarrett, >>> >>> As per previous emails, the problem is that you can't now force it to do a >>> query using any particular method. Associations will cache if you >>> enumerate them and so will not behave in that simple way. >>> >>> Yes we have tests and yes it does show that this kind of change breaks >>> things. That's why I'm complaining. >>> >>> Cheers, >>> Will >>> >>> >>> On 28/02/2013, at 15:16 , Jarrett Meyer <[email protected]> wrote: >>> >>>> Most other "enterprise-y" languages (esp. Java+Hibernate, .NET+NHibernate, >>>> .NET+Entity Framework) reinforce deferred execution of queries: the query >>>> is not executed until it is enumerated. This is now the exact same >>>> behavior as those platforms. >>>> >>>> Calling .sum() on an association, before you've enumerated, will alter the >>>> query to perform a SELECT SUM(...). Obviously, this fails on anything that >>>> doesn't exist in the database. If you want to .sum() in memory, you must >>>> enumerate the collection first (calling .ToArray() in .NET will do this). >>>> I don't know if the author of this deferred execution has experience with >>>> these other ORM's, but the behavior is now identical. >>>> >>>> Employee.all vs. Employee.all.to_a is not that big of a deal. And you >>>> should expect breaking changes with a major version number. That's why >>>> your code is covered by tests, right? >>>> >>>> Signed, >>>> An-ex-.NET-developer-turned-Rubyist >>>> >>>> -- >>>> Jarrett Meyer >>>> Email: [email protected] >>>> Web: JarrettMeyer.com >>>> Twitter: @jarrettmeyer >>>> >>>> >>>> On Wed, Feb 27, 2013 at 6:09 PM, Will Bryant <[email protected]> wrote: >>>> That's better than nothing, but #all returns a relation now, which is half >>>> the problem (like when you need to sum methods not columns, for eg.). >>>> >>>> >>>> On 28/02/2013, at 12:00 , Duncan Beevers <[email protected]> wrote: >>>> >>>>> Or all(true) >>>>> >>>>> >>>>> On Wed, Feb 27, 2013 at 4:25 PM, Will Bryant <[email protected]> >>>>> wrote: >>>>> >>>>> On 28/02/2013, at 11:17 , Jon Leighton <[email protected]> wrote: >>>>> >>>>> > #reload will always run the query. >>>>> > >>>>> > If I'm misunderstanding the use case please provide some examples. >>>>> >>>>> Hmm. But you can't run reload on a scope to get an array - it returns a >>>>> relation, which as per previous emails doesn't behave the same. >>>>> >>>>> So are you saying we should use .reload.to_a everywhere instead of #all? >>>>> >>>>> That really seems like a worse API than #all and this is a very common >>>>> operation. Is it really worth changing #all to be nearly useless and >>>>> have no direct to do that? >>>>> >>>>> Could we at least have a method that does this, say "query"? >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google Groups >>>>> "Ruby on Rails: Core" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send an >>>>> email to [email protected]. >>>>> To post to this group, send email to [email protected]. >>>>> Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google Groups >>>>> "Ruby on Rails: Core" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send an >>>>> email to [email protected]. >>>>> To post to this group, send email to [email protected]. >>>>> Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. >>>>> For more options, visit https://groups.google.com/groups/opt_out. >>>>> >>>>> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "Ruby on Rails: Core" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>>> >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google Groups >>>> "Ruby on Rails: Core" group. >>>> To unsubscribe from this group and stop receiving emails from it, send an >>>> email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. >>>> For more options, visit https://groups.google.com/groups/opt_out. >>>> >>>> >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Ruby on Rails: Core" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. >>> For more options, visit https://groups.google.com/groups/opt_out. >>> >>> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Ruby on Rails: Core" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. >> For more options, visit https://groups.google.com/groups/opt_out. >> >> > > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > > > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Core" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/rubyonrails-core?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Core" group. 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