This is Ecto 2.0.0-rc, through phoenix_ecto 3.0.0-rc.0 Op donderdag 26 mei 2016 19:51:44 UTC+2 schreef José Valim: > > Which Ecto version are you using? > > *José Valim* > www.plataformatec.com.br > Skype: jv.ptec > Founder and Director of R&D > > On Thu, May 26, 2016 at 6:30 PM, <[email protected] <javascript:>> wrote: > >> So I have been digging a little deeper and Ecto is issuing the following >> query: >> >> *SELECT r0."id", *snip*, o1."offer_id" FROM "rates" AS r0 INNER JOIN >> "offers_rates" AS o1 ON o1."offer_id" = ANY($1) WHERE (o1."rate_id" = >> r0."id") ORDER BY o1."offer_id" [[<<163, 3, 242, 94, 74, 2, 77, 110, 159, >> 78, 123, 64, 97, 42, 5, 33>>]]* >> >> >> This comes up as an empty association in my code. When I do the following >> query in psql however, I do get the result I expect: >> >> *SELECT * FROM rates INNER JOIN offers_rates ON >> offers_rates.offer_id='a303f25e-4a02-4d6e-9f4e-7b40612a0521' WHERE >> offers_rates.rate_id = rates.id <http://rates.id>; * >> >> >> Does this offer some more insight? >> >> Op donderdag 26 mei 2016 18:09:47 UTC+2 schreef [email protected]: >> >>> Hi José, >>> >>> Thanks for the fast response. That doesn't seem to do it however. If I >>> do not preload anything, I get an error message saying that the offers are >>> not preloaded. If I preload the offers, it says the rates are not >>> preloaded, and if I preload everything, with force set to true, the rates >>> are still empty. Is there anything else I can try? >>> >>> Op donderdag 26 mei 2016 17:07:36 UTC+2 schreef José Valim: >>>> >>>> Try: >>>> >>>> *offers = Repo.preload(shipment, [offers: :rates], force: true)* >>>> >>>> If the association was already loaded, we won't load over it. >>>> >>>> *José Valim* >>>> www.plataformatec.com.br >>>> Skype: jv.ptec >>>> Founder and Director of R&D >>>> >>>> On Thu, May 26, 2016 at 5:05 PM, <[email protected]> wrote: >>>> >>>>> Hello, >>>>> >>>>> I have a many-to-many relationship defined as follows: >>>>> >>>>> * schema "rates" do* >>>>> * many_to_many :offers, Offer, join_through: "offers_rates"* >>>>> * end* >>>>> >>>>> >>>>> * schema "offers" do* >>>>> * many_to_many :rates, Rate, join_through: "offers_rates"* >>>>> * end * >>>>> >>>>> >>>>> The offers_rates table is simply a table that has a offer_id column, >>>>> and a rate_id column. I am saving records as follows: >>>>> >>>>> * Enum.map rates, fn (rate) ->* >>>>> * Offer.changeset(%Offer{rates: [rate]}, %{shipment_id: >>>>> rate.shipment_id, percentage: 1.05})* >>>>> * |> Repo.insert!()* >>>>> * end * >>>>> >>>>> >>>>> For every rate, this is generating an offer. I am association the >>>>> rates with the offer in the changeset. This seems to work as I can see >>>>> the >>>>> join table being filled properly. When I try to fetch them later, the >>>>> association is empty however: >>>>> >>>>> *offers = Repo.preload(shipment, offers: :rates)* >>>>> >>>>> >>>>> * %Offer{rates: []} * >>>>> >>>>> >>>>> Are these the proper ways of association records and fetching them >>>>> from the database again? Any push in the right direction is greatly >>>>> appreciated. >>>>> >>>>> Thanks! >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "elixir-lang-talk" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/elixir-lang-talk/90e0e96e-a6ca-4111-b4cc-e9d180b99b6b%40googlegroups.com >>>>> >>>>> <https://groups.google.com/d/msgid/elixir-lang-talk/90e0e96e-a6ca-4111-b4cc-e9d180b99b6b%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> -- >> You received this message because you are subscribed to the Google Groups >> "elixir-lang-talk" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elixir-lang-talk/589094f3-2694-4b15-9d39-03d8e4869682%40googlegroups.com >> >> <https://groups.google.com/d/msgid/elixir-lang-talk/589094f3-2694-4b15-9d39-03d8e4869682%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > >
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