fix: support plain equality in _where

src/app.test.ts

@@ -1,4 +1,4 @@
-   import assert from 'node:assert/strict'
+import assert from 'node:assert/strict'
 import { writeFileSync } from 'node:fs'
 import { join } from 'node:path'
 import test from 'node:test'
@@ -137,11 +137,17 @@ await test('createApp', async (t) => {
     assert.deepEqual(data, [{ id: '1', title: 'foo' }])
   })
 
+  await t.test('GET /posts?_where=... supports plain equality', async () => {
+    const where = encodeURIComponent(JSON.stringify({ title: 'foo' }))
+    const response = await fetch(`http://localhost:${port}/posts?_where=${where}`)
+    assert.equal(response.status, 200)
+    const data = await response.json()
+    assert.deepEqual(data, [{ id: '1', title: 'foo' }])
+  })
+
   await t.test('GET /posts?_where=... overrides query params', async () => {
     const where = encodeURIComponent(JSON.stringify({ title: { eq: 'foo' } }))
-    const response = await fetch(
-      `http://localhost:${port}/posts?title:eq=bar&_where=${where}`,
-    )
+    const response = await fetch(`http://localhost:${port}/posts?title:eq=bar&_where=${where}`)
     assert.equal(response.status, 200)
     const data = await response.json()
     assert.deepEqual(data, [{ id: '1', title: 'foo' }])

src/matches-where.test.ts

@@ -8,6 +8,12 @@ import { matchesWhere } from './matches-where.ts'
 await test('matchesWhere', async (t) => {
   const obj: JsonObject = { a: 10, b: 20, c: 'x', nested: { a: 10, b: 20 } }
   const cases: [JsonObject, boolean][] = [
+    [{ a: 10 }, true],
+    [{ a: 11 }, false],
+    [{ c: 'x' }, true],
+    [{ c: 'z' }, false],
+    [{ a: 10, c: 'x' }, true],
+    [{ a: 10, c: 'z' }, false],
     [{ a: { eq: 10 } }, true],
     [{ a: { eq: 11 } }, false],
     [{ c: { ne: 'y' } }, true],

src/matches-where.ts

@@ -79,9 +79,7 @@ export function matchesWhere(obj: JsonObject, where: JsonObject): boolean {
       continue
     }
 
-    if (field === undefined) return false
-
-    return false
+    if (field === undefined || field !== value) return false
   }
 
   return true