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Handle missing references

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This commit is contained in:
Tom Alexander 2020-04-12 21:26:23 -04:00
parent fe32edbc28
commit 24d2c1831c
Signed by: talexander
GPG Key ID: D3A179C9A53C0EDE
3 changed files with 9 additions and 2 deletions
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1
js/test_cases/missing_reference/input1.json Normal file
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@ -0,0 +1 @@
{"rank": "Admiral"}

1
js/test_cases/missing_reference/main.dust Normal file
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@ -0,0 +1 @@
Hello {name}!

9
src/renderer/renderer.rs
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@ -87,8 +87,13 @@ impl<'a> DustRenderer<'a> {
match tag {
DustTag::DTComment(_comment) => (),
DustTag::DTReference(reference) => {
let val = walk_path(context, &reference.path.keys)?;
return val.render();
let val = walk_path(context, &reference.path.keys);
if let Err(RenderError::WontWalk { .. }) = val {
// If reference does not exist in the context, it becomes an empty string
return Ok("".to_owned());
} else {
return val?.render();
}
}
_ => (), // TODO: Implement the rest
}