ecto

问题 I have an upsert requirement, so I need to call a postgres stored procedure or use a common table expression. I also use the pgcrypto exgtension for passwords and would like to use postgres functions (such as "crypt" to encode/decode passwords). But I can not find a way to get Ecto to play with raw sql in part or whole, is it intended that ecto will only support the elixir dsl and not allow shelling out to raw sql when the dsl is not sufficient? I've found that I can query via the adapter

问题 In my Phoenix app, I'm trying to insert an event record into the database that has fields for start_time and end_time - the datetime data will already be converted to ISO string format on the client and passed to the Phoenix API as JSON data, but this is causing me some trouble when I try to make an insert - the model is expecting those values to be :utc_datetime so I need to convert them - I read through the documentation, but I'm still not sure... First off, here's the schema for the model:

问题 In config/dev.exs : config :drupex, Drupex.Repo, adapter: Ecto.Adapters.Postgres, -- username, password, database, hostname, pool_size omitted -- config :drupex, Drupex.DrupalRepo, adapter: Ecto.Adapters.Mysql, -- username, password, database, hostname omitted -- In mix.exs under defp deps do I added {:mariaex, "~> 0.8.2"}, just after {:postgrex, ">= 0.0.0"} . Finally in lib/drupex/repo.ex I added defmodule Drupex.DrupalRepo do use Ecto.Repo, otp_app: :drupex end I ran mix deps.get , mix deps

问题 I trying to write Ecto query which will be select data from two tables at the same time. Like Select t1.*,t2.* from table1 t1,table2 t2 where t1.id=1 and t2.id=2 I can't find solution, found only way to write raw SQL and it's looks like not good. Like variant -using preload, but it's spawn additional query. comments_query = from c in Comment, order_by: c.published_at Repo.all from p in Post, preload: [comments: ^comments_query] Thanks for any ideas 回答1: Try this from Ecto.Query https:/

问题 If the record does not exist, I would expect this conditional to create it, but it does not.... nil is returned. case Repo.get_by(User, %{email: "hulk@hogan.com"}) do struct -> struct nil -> params = Map.merge(%{email: "hulk@hogan.com"}, %{password: "password"}) Repo.insert!(User.changeset(User.__struct__, params)) end # returns nil.... huwutt??? However, if I change the ordering of the condition, it works. What am I missing here? case Repo.get_by(User, %{email: "hulk@hogan.com"}) do nil ->

问题 I'm trying to use cast_assoc to associate records that exist on different schemas. In the code below, Organization exists in a tenant schema (e.g. "tenant_2837.organizations"), whereas Workspace exists on the public schema (e.g. "public.workspaces"). When the code runs, Ecto tries to create the Workspace under the tenant schema. %Organization{} |> Organization.create_organization_changeset(attrs) |> cast_assoc(:workspace, with: &Workspace.changeset/2) |> Repo.insert(prefix: TenantActions

问题 Suppose I have two models: Parent and Child. If a Child record is updated, is there an option to update the associated Parent record timestamp automatically? 回答1: There are a couple ways you can do it. One of them requires Ecto master (soon to be Ecto v2.0) and is by simply updating the parent directly: # Assuming a child_changeset with the parent loaded child_changset = Ecto.Changeset.put_assoc(child_changeset, :parent, %{updated_at: Ecto.DateTime.utc}) Now, when the child is persisted, it

问题 I get this warning when casting warning: casting embeds with cast/4 is deprecated, please use cast_embed/3 instead I have the model Organization defmodule Bonsai.Organization do use Bonsai.Web, :model alias Bonsai.OrganizationSettings schema "organizations" do field :name, :string field :currency, :string field :tenant, :string field :info, :map, default: %{} embeds_one :settings, OrganizationSettings, on_replace: :delete timestamps end @required_fields ~w(name currency tenant) @optional

问题 I have following models... Page Category i have following code in new action of page_controller.ex def new(conn, _params) do changeset = Page.changeset(%Page{}) categories = Repo.all(Category) render(conn, "new.html", changeset: changeset, categories: categories) end I have following code for select field in page/new.html.eex <div class="form-group"> <%= label f, :category_id, "Parent", class: "control-label" %> <%= select f, :category_id, @categories ,class: "form-control" %> </div> It

问题 I have an Ecto schema that includes field :owned_by_id, :string . I declared the field a string because I need to support values like "abc123" as well as values like "123". The docs for cast/3 say: The second argument is a map of params that are cast according to the type information from data . In my module, I define changeset like: def changeset(struct, params \\ %{}) do cast(struct, params, [:owned_by_id]) end When I do this: MyModule.changeset(%MyModule{}, %{owned_by_id: 1}) ... I would