Fix nested json array transform - fixes #506

Author: porsager

src/types.js

@@ -327,7 +327,7 @@ function createJsonTransform(fn) {
   return function jsonTransform(x, column) {
     return column.type === 114 || column.type === 3802
       ? Array.isArray(x)
-        ? x.map(jsonTransform)
+        ? x.map(x => jsonTransform(x, column))
         : Object.entries(x).reduce((acc, [k, v]) => Object.assign(acc, { [fn(k)]: v }), {})
       : x
   }

tests/index.js

@@ -604,6 +604,14 @@ t('column toKebab', async() => {
   return ['hello-world', Object.keys((await sql`select * from test`)[0])[0], await sql`drop table test`]
 })
 
+t('Transform nested json in arrays', async() => {
+  const sql = postgres({
+    ...options,
+    transform: postgres.camel
+  })
+  return ['aBcD', (await sql`select '[{"a_b":1},{"c_d":2}]'::jsonb as x`)[0].x.map(Object.keys).join('')]
+})
+
 t('unsafe', async() => {
   await sql`create table test (x int)`
   return [1, (await sql.unsafe('insert into test values ($1) returning *', [1]))[0].x, await sql`drop table test`]