fix: include columns param on bulk INSERT

src/lib/PostgrestQueryBuilder.ts

@@ -107,6 +107,12 @@ export default class PostgrestQueryBuilder<T> extends PostgrestBuilder<T> {
 
     this.headers['Prefer'] = prefersHeaders.join(',')
 
+    if (Array.isArray(values)) {
+      const columns = values.reduce((acc, x) => acc.concat(Object.keys(x)), [] as string[])
+      const uniqueColumns = [...new Set(columns)]
+      this.url.searchParams.set('columns', uniqueColumns.join(','))
+    }
+
     return new PostgrestFilterBuilder(this)
   }
 

test/basic.ts

@@ -234,3 +234,8 @@ describe("insert, update, delete with count: 'exact'", () => {
     expect(res).toMatchSnapshot()
   })
 })
+
+test('insert includes columns param', async () => {
+  const client = postgrest.from('users').insert([{ foo: 1 }, { bar: 2 }])
+  expect((client as any).url.searchParams.get('columns')).toMatchInlineSnapshot(`"foo,bar"`)
+})