Ash_double_entry Transfer - How to fix " no function clause matching in Postgrex.DefaultTypes"

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1

I am getting the following error while trying to transfer money from account one to account two using ash_double_entry package.

I have installed ash_money package and migrated as per the guide but I am still getting this error. Kindly assist.

:error,
 %Ash.Error.Unknown{
   changeset: "#Changeset<>", 
   errors: [
     %Ash.Error.Unknown.UnknownError{
       error: "** (FunctionClauseError) no function clause matching in Postgrex.DefaultTypes.\"-inlined-Elixir.Postgrex.Extensions.Numeric/1-\"/1",
       field: nil,
       splode: Ash.Error,
       bread_crumbs: [],
       vars: [],
       path: [],
       stacktrace: #Splode.Stacktrace<>,
       class: :unknown
     }
   ]
 }}

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2

This looks pretty strange, and is not something I experience in my own applications :thinking: If you could please create a small project that reproduces the issue, I will investigate.

3

The issue could be with the extension migrations, because I quickly set up a new project and it worked. I will keep investigating, once I find the solution I will share it here.

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4

It is clear that there’s a numeric Type Ash expect from the DB, it is not getting.

5

This looks lower down, in Ecto/postgrex. If you can’t reproduce in a normal setup, I can only assume there is something special about your existing setup. Perhaps you can try upgrading postgrex, Ecto, ecto_sql etc.? What version of Postgres are you on?

6

The issue was in the migrations. To solve it I did the following.

  1. I created a small project and added ash_double_entry.
  2. Then, I added all resources and domain as per documentation. Account, Transfer, Balance resources and Ledger domain.
  3. I generated migrations using mix ash_postgres.generate_mistions --name add_ash_double_entry_tables
  4. Tested the new project and confirmed all is well.
  5. Then I replaced ash_double_entry table in the project with issues with the small project migrations: xxxxx_install_4_extensions.exs and xxxxxx_add_double_entry_tables migrations.

Note that I did some edit so that the migration won’t conflict with the existing ones

This gist contains the migrations that solved the problem.

1 Like
7

Alternatively, to solve this, you can just drop all migrations and generate migration afresh with the latest package versions. It should work as well.

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