Added support for deep selecting

lib/prisma.ts

@@ -12,16 +12,25 @@ if (process.env.NODE_ENV === "production") {
   prisma = globalAny.prisma;
 }
 
+const pluck = (select: Record<string, boolean>, attr: string) => {
+  const parts = attr.split(".");
+  const alwaysAttr = parts[0];
+  const pluckedValue =
+    parts.length > 1
+      ? {
+          select: pluck(select[alwaysAttr] ? select[alwaysAttr].select : {}, parts.slice(1).join(".")),
+        }
+      : true;
+  return {
+    ...select,
+    [alwaysAttr]: pluckedValue,
+  };
+};
+
 const whereAndSelect = (modelQuery, criteria: Record<string, unknown>, pluckedAttributes: string[]) =>
   modelQuery({
     where: criteria,
-    select: pluckedAttributes.reduce(
-      (select: { [string]: boolean }, attr: string) => ({
-        ...select,
-        [attr]: true,
-      }),
-      {}
-    ),
+    select: pluckedAttributes.reduce(pluck, {}),
   });
 
 export { whereAndSelect };

test/lib/prisma.test.ts

@@ -0,0 +1,101 @@
+
+import {it, expect} from '@jest/globals';
+import {whereAndSelect} from "@lib/prisma";
+
+it('can decorate using whereAndSelect', async () => {
+  whereAndSelect( (queryObj) => {
+    expect(queryObj).toStrictEqual({ where: { id: 1 }, select: { example: true } });
+    },
+    { id: 1 },
+    [
+      "example"
+    ])
+});
+
+it('can do nested selects using . seperator', async () => {
+
+  whereAndSelect( (queryObj) => {
+      expect(queryObj).toStrictEqual({
+        where: {
+          uid: 1,
+        },
+        select: {
+          description: true,
+          attendees: {
+            select: {
+              email: true,
+              name: true,
+            },
+          },
+        }
+      });
+    },
+    { uid: 1 },
+    [
+      "description",
+      "attendees.email",
+      "attendees.name",
+    ])
+})
+
+it('can handle nesting deeply', async () => {
+  whereAndSelect( (queryObj) => {
+      expect(queryObj).toStrictEqual({
+        where: {
+          uid: 1,
+        },
+        select: {
+          description: true,
+          attendees: {
+            select: {
+              email: {
+                select: {
+                  nested: true
+                }
+              },
+              name: true,
+            },
+          },
+        }
+      });
+    },
+    { uid: 1 },
+    [
+      "description",
+      "attendees.email.nested",
+      "attendees.name",
+    ])
+});
+
+it('can handle nesting multiple', async () => {
+  whereAndSelect( (queryObj) => {
+      expect(queryObj).toStrictEqual({
+        where: {
+          uid: 1,
+        },
+        select: {
+          description: true,
+          attendees: {
+            select: {
+              email: true,
+              name: true,
+            },
+          },
+          bookings: {
+            select: {
+              id: true,
+              name: true,
+            }
+          }
+        }
+      });
+    },
+    { uid: 1 },
+    [
+      "description",
+      "attendees.email",
+      "attendees.name",
+      "bookings.id",
+      "bookings.name",
+    ])
+});