improvement: add data_layer? option to Ash.calculate/3

This option allows you to force us to use the data layer instead of attempting to resolve expressions in memory.
ash-project · Jan 1, 2025 · 7fa8dc6 · 7fa8dc6
1 parent 088d030
commit 7fa8dc6
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Showing 2 changed files with 15 additions and 5 deletions.
diff --git a/lib/ash.ex b/lib/ash.ex
@@ -741,6 +741,12 @@ defmodule Ash do
       A record to use as the base of the calculation
       """
     ],
+    data_layer?: [
+      type: :boolean,
+      doc: """
+      Set to `true` to require that the value be computed within the data layer. Only works for calculations that define an expression.
+      """
+    ],
     domain: [
       type: {:spark, Ash.Domain},
       doc: "The domain to use for the action"

diff --git a/lib/ash/actions/read/calculations.ex b/lib/ash/actions/read/calculations.ex
@@ -85,11 +85,15 @@ defmodule Ash.Actions.Read.Calculations do
 
               evaled =
                 try do
-                  Ash.Expr.eval(expr,
-                    record: record,
-                    resource: resource,
-                    unknown_on_unknown_refs?: true
-                  )
+                  if opts[:data_layer?] do
+                    :unknown
+                  else
+                    Ash.Expr.eval(expr,
+                      record: record,
+                      resource: resource,
+                      unknown_on_unknown_refs?: true
+                    )
+                  end
                 rescue
                   _ ->
                     :unknown