---
source: apollo-router/src/configuration/upgrade.rs
expression: "apply_migration(&source_doc(),\n &Migration::builder().action(Action::Change {\n path: \"obj.field1\".to_string(),\n from: Value::Number(1u64.into()),\n to: Value::String(\"a\".into()),\n }).description(\"change field1\").build()).expect(\"expected successful migration\")"
---
{
"obj": {
"field1": "a",
"field2": 2
},
"arr": [
"v1",
"v2"
]
}