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Raise when trying to count a source #127

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Merged
merged 1 commit into from
Sep 22, 2023
Merged

Raise when trying to count a source #127

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6 changes: 6 additions & 0 deletions lib/ecto/adapters/sqlite3/connection.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -1375,6 +1375,12 @@ defmodule Ecto.Adapters.SQLite3.Connection do

def expr({:count, _, []}, _sources, _query), do: "count(*)"

def expr({:count, _, [{:&, _, [_]}]}, _sources, query) do
raise Ecto.QueryError,
query: query,
message: "The argument to `count/1` must be a column in SQLite3"
end

def expr({:json_extract_path, _, [expr, path]}, sources, query) do
path =
Enum.map(path, fn
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13 changes: 13 additions & 0 deletions test/ecto/adapters/sqlite3/connection/aggregates_test.exs
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Expand Up @@ -15,6 +15,19 @@ defmodule Ecto.Adapters.SQLite3.Connection.AggregatesTest do
assert ~s{SELECT count(s0."x") FROM "schema" AS s0} == all(query)
end

test "raises when counting a source" do
query =
Schema
|> select([r], count(r))
|> plan()

msg = ~r"The argument to `count/1` must be a column in SQLite3"

assert_raise Ecto.QueryError, msg, fn ->
all(query)
end
end

test "raises when trying to distinct count" do
assert_raise Ecto.QueryError, fn ->
Schema
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