allow string names in field/2

lib/ecto/adapters/myxql/connection.ex

@@ -671,14 +671,14 @@ if Code.ensure_loaded?(MyXQL) do
     end
 
     defp expr({{:., _, [{:parent_as, _, [as]}, field]}, _, []}, _sources, query)
-         when is_atom(field) do
+         when is_atom(field) or is_binary(field) do
       {ix, sources} = get_parent_sources_ix(query, as)
       {_, name, _} = elem(sources, ix)
       [name, ?. | quote_name(field)]
     end
 
     defp expr({{:., _, [{:&, _, [idx]}, field]}, _, []}, sources, _query)
-         when is_atom(field) do
+         when is_atom(field) or is_binary(field) do
       {_, name, _} = elem(sources, idx)
       [name, ?. | quote_name(field)]
     end

lib/ecto/adapters/postgres/connection.ex

@@ -916,12 +916,13 @@ if Code.ensure_loaded?(Postgrex) do
     end
 
     defp expr({{:., _, [{:parent_as, _, [as]}, field]}, _, []}, _sources, query)
-         when is_atom(field) do
+         when is_atom(field) or is_binary(field) do
       {ix, sources} = get_parent_sources_ix(query, as)
       quote_qualified_name(field, sources, ix)
     end
 
-    defp expr({{:., _, [{:&, _, [idx]}, field]}, _, []}, sources, _query) when is_atom(field) do
+    defp expr({{:., _, [{:&, _, [idx]}, field]}, _, []}, sources, _query)
+         when is_atom(field) or is_binary(field) do
       quote_qualified_name(field, sources, idx)
     end
 

lib/ecto/adapters/tds/connection.ex

@@ -733,7 +733,7 @@ if Code.ensure_loaded?(Tds) do
     end
 
     defp expr({{:., _, [{:parent_as, _, [as]}, field]}, _, []}, _sources, query)
-         when is_atom(field) do
+         when is_atom(field) or is_binary(field) do
       {ix, sources} = get_parent_sources_ix(query, as)
       {_, name, _} = elem(sources, ix)
       [name, ?. | quote_name(field)]

mix.exs

@@ -76,7 +76,7 @@ defmodule EctoSQL.MixProject do
     if path = System.get_env("ECTO_PATH") do
       {:ecto, path: path}
     else
-      {:ecto, "~> 3.12"}
+      {:ecto, git: "https://github.com/greg-rychlewski/ecto.git", branch: "string_field_name"}
     end
   end
 

mix.lock

@@ -4,7 +4,7 @@
   "decimal": {:hex, :decimal, "2.1.1", "5611dca5d4b2c3dd497dec8f68751f1f1a54755e8ed2a966c2633cf885973ad6", [:mix], [], "hexpm", "53cfe5f497ed0e7771ae1a475575603d77425099ba5faef9394932b35020ffcc"},
   "deep_merge": {:hex, :deep_merge, "1.0.0", "b4aa1a0d1acac393bdf38b2291af38cb1d4a52806cf7a4906f718e1feb5ee961", [:mix], [], "hexpm", "ce708e5f094b9cd4e8f2be4f00d2f4250c4095be93f8cd6d018c753894885430"},
   "earmark_parser": {:hex, :earmark_parser, "1.4.41", "ab34711c9dc6212dda44fcd20ecb87ac3f3fce6f0ca2f28d4a00e4154f8cd599", [:mix], [], "hexpm", "a81a04c7e34b6617c2792e291b5a2e57ab316365c2644ddc553bb9ed863ebefa"},
-  "ecto": {:hex, :ecto, "3.12.0", "9014a3ccac7f91e680b9d237d461ebe3d4e16d62ca8e355d540e2c6afdc28309", [:mix], [{:decimal, "~> 2.0", [hex: :decimal, repo: "hexpm", optional: false]}, {:jason, "~> 1.0", [hex: :jason, repo: "hexpm", optional: true]}, {:telemetry, "~> 0.4 or ~> 1.0", [hex: :telemetry, repo: "hexpm", optional: false]}], "hexpm", "41e781a76e131093af8e1edf68b1319bf320878faff58da41ffa4b10fc6ff678"},
+  "ecto": {:git, "https://github.com/greg-rychlewski/ecto.git", "ee1a5714b10862de7e3fe85e80f042461a07e41c", [branch: "string_field_name"]},
   "ex_doc": {:hex, :ex_doc, "0.34.2", "13eedf3844ccdce25cfd837b99bea9ad92c4e511233199440488d217c92571e8", [:mix], [{:earmark_parser, "~> 1.4.39", [hex: :earmark_parser, repo: "hexpm", optional: false]}, {:makeup_c, ">= 0.1.0", [hex: :makeup_c, repo: "hexpm", optional: true]}, {:makeup_elixir, "~> 0.14 or ~> 1.0", [hex: :makeup_elixir, repo: "hexpm", optional: false]}, {:makeup_erlang, "~> 0.1 or ~> 1.0", [hex: :makeup_erlang, repo: "hexpm", optional: false]}, {:makeup_html, ">= 0.1.0", [hex: :makeup_html, repo: "hexpm", optional: true]}], "hexpm", "5ce5f16b41208a50106afed3de6a2ed34f4acfd65715b82a0b84b49d995f95c1"},
   "jason": {:hex, :jason, "1.4.4", "b9226785a9aa77b6857ca22832cffa5d5011a667207eb2a0ad56adb5db443b8a", [:mix], [{:decimal, "~> 1.0 or ~> 2.0", [hex: :decimal, repo: "hexpm", optional: true]}], "hexpm", "c5eb0cab91f094599f94d55bc63409236a8ec69a21a67814529e8d5f6cc90b3b"},
   "makeup": {:hex, :makeup, "1.1.2", "9ba8837913bdf757787e71c1581c21f9d2455f4dd04cfca785c70bbfff1a76a3", [:mix], [{:nimble_parsec, "~> 1.2.2 or ~> 1.3", [hex: :nimble_parsec, repo: "hexpm", optional: false]}], "hexpm", "cce1566b81fbcbd21eca8ffe808f33b221f9eee2cbc7a1706fc3da9ff18e6cac"},

test/ecto/adapters/myxql_test.exs

@@ -1627,6 +1627,16 @@ defmodule Ecto.Adapters.MyXQLTest do
     end)
   end
 
+  test "field/2 with string name" do
+    query = from(s in "schema", select: field(s, "x")) |> plan(:all) |> all()
+    assert query == ~s{SELECT s0.`x` FROM `schema` AS s0}
+
+    query =
+      from(s in "schema", as: :schema, select: field(as(:schema), "x")) |> plan(:all) |> all()
+
+    assert query == ~s{SELECT s0.`x` FROM `schema` AS s0}
+  end
+
   # DDL
 
   import Ecto.Migration,

test/ecto/adapters/postgres_test.exs

@@ -2033,6 +2033,16 @@ defmodule Ecto.Adapters.PostgresTest do
     end)
   end
 
+  test "field/2 with string name" do
+    query = from(s in "schema", select: field(s, "x")) |> plan(:all) |> all()
+    assert query == ~s{SELECT s0."x" FROM "schema" AS s0}
+
+    query =
+      from(s in "schema", as: :schema, select: field(as(:schema), "x")) |> plan(:all) |> all()
+
+    assert query == ~s{SELECT s0."x" FROM "schema" AS s0}
+  end
+
   # DDL
 
   alias Ecto.Migration.Reference

test/ecto/adapters/tds_test.exs

@@ -1397,6 +1397,16 @@ defmodule Ecto.Adapters.TdsTest do
     end)
   end
 
+  test "field/2 with string name" do
+    query = from(s in "schema", select: field(s, "x")) |> plan(:all) |> all()
+    assert query == ~s{SELECT s0.[x] FROM [schema] AS s0}
+
+    query =
+      from(s in "schema", as: :schema, select: field(as(:schema), "x")) |> plan(:all) |> all()
+
+    assert query == ~s{SELECT s0.[x] FROM [schema] AS s0}
+  end
+
   ## DDL
 
   import Ecto.Migration,