Welcome to ElixirDrops!

Hello there and welcome to the ultimate hub for the Elixir community! Whether you're a seasoned developer or just starting your journey, ElixirDrops is the perfect place to discover, share, and discuss the best tips and tricks for mastering Elixir. Sign in to explore, learn and become a contributor on this platform.

Setting updated_at yourself in Repo.update_all/3

Repo.update_all/3 writes the columns you give it and nothing else, so updated_at keeps its old value:...
almirsarajcic

almirsarajcic

3 hours ago

0

How we use ETS as a live code-graph database in Synapse MCP

We have built/building Synapse MCP — a tool that gives AI agents a persistent map of your codebase — and one design question came up early: where does...
spasm-myelixlabs

spasm-myelixlabs

13 hours ago

0

Running doctests against the database

Doctests are straightforward until an example calls Repo. A plain ExUnit case doesn't check out an Ecto sandbox connection, so run database-backed doc...
almirsarajcic

almirsarajcic

yesterday

0

Keeping Oban's time units explicit

Oban's Lifeline and Pruner accept raw integers in different units: rescue_after is milliseconds, while max_age is seconds. On current Oban releases, ...
almirsarajcic

almirsarajcic

2 days ago

0

Catching GenServer.call/3 timeout exits

GenServer.call/3 does not return {:error, :timeout} when the server misses its deadline. It exits the caller instead....
almirsarajcic

almirsarajcic

3 days ago

0

Keeping self() straight in on_exit callbacks

An on_exit callback looks like it belongs to the test that registered it, but self() inside the callback is not the test PID:...
almirsarajcic

almirsarajcic

4 days ago

0

Clearing inherited variables in System.cmd

Passing env: [] to System.cmd/3 does not clear the child environment....
almirsarajcic

almirsarajcic

5 days ago

0

Running Task.async_stream/3 for side effects

Calling Task.async_stream/3 does not start any tasks:...
almirsarajcic

almirsarajcic

6 days ago

0

Keeping timeouts active while tracing tests

A test can stop timing out when you rerun it with --trace:...
almirsarajcic

almirsarajcic

7 days ago

0

Starting only what a FLAME runner needs

When FLAME boots a remote runner, it starts your application there, so your application has to decide which supervision children belong on that runner...
almirsarajcic

almirsarajcic

8 days ago

0

Keeping stale gzip assets out of Phoenix tests

I spent too long debugging a LiveView hook in ElixirDrops because the browser kept running old JavaScript. The source and freshly built app.js were co...
almirsarajcic

almirsarajcic

9 days ago

0

Let ExUnit shut down your test processes

Start test-owned processes with start_supervised!/1 so ExUnit waits for them to shut down before running your cleanup callbacks....
almirsarajcic

almirsarajcic

10 days ago

0

Put `phx-change` inputs inside a form

Put every input with its own phx-change binding inside a form. Outside one, the markup looks wired, but LiveView will not send the event....
almirsarajcic

almirsarajcic

11 days ago

0

Check the exit status from `System.cmd/3`

Check the exit status when wrapping an external command. A nonzero exit from the program does not make System.cmd/3 raise....
almirsarajcic

almirsarajcic

12 days ago

0

Make `capture_log` assertions test-specific

Do not assert on generic text in logs captured by async tests....
almirsarajcic

almirsarajcic

13 days ago

0