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Add `#[serde(skip_serializing)] to skip serializing some fields

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Closes #99
This commit is contained in:
Erick Tryzelaar
2015-07-23 08:07:49 -07:00
parent 447d08bd91
commit b1cb5379de
5 changed files with 58 additions and 12 deletions
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serde_codegen/src/field.rs
+24 -10
View File
@@ -58,10 +58,18 @@ fn default_value(mi: &ast::MetaItem) -> bool {
}
}
fn skip_serializing_field(mi: &ast::MetaItem) -> bool {
if let ast::MetaItem_::MetaWord(ref n) = mi.node {
n == &"skip_serializing"
} else {
false
}
}
fn field_attrs<'a>(
builder: &aster::AstBuilder,
field: &'a ast::StructField,
) -> (Rename<'a>, bool) {
) -> (Rename<'a>, bool, bool) {
field.node.attrs.iter()
.find(|sa| {
if let ast::MetaList(ref n, _) = sa.node.value.node {
@@ -73,15 +81,18 @@ fn field_attrs<'a>(
.and_then(|sa| {
if let ast::MetaList(_, ref vals) = sa.node.value.node {
attr::mark_used(&sa);
Some((vals.iter()
.fold(None, |v, mi| v.or(rename(builder, mi)))
.unwrap_or(Rename::None),
vals.iter().any(|mi| default_value(mi))))
Some((
vals.iter()
.fold(None, |v, mi| v.or(rename(builder, mi)))
.unwrap_or(Rename::None),
vals.iter().any(|mi| default_value(mi)),
vals.iter().any(|mi| skip_serializing_field(mi)),
))
} else {
Some((Rename::None, false))
Some((Rename::None, false, false))
}
})
.unwrap_or((Rename::None, false))
.unwrap_or((Rename::None, false, false))
}
pub fn struct_field_attrs(
@@ -92,23 +103,26 @@ pub fn struct_field_attrs(
struct_def.fields.iter()
.map(|field| {
match field_attrs(builder, field) {
(Rename::Global(rename), default_value) =>
(Rename::Global(rename), default_value, skip_serializing_field) =>
FieldAttrs::new(
skip_serializing_field,
default_value,
builder.expr().build_lit(P(rename.clone()))),
(Rename::Format(renames), default_value) => {
(Rename::Format(renames), default_value, skip_serializing_field) => {
let mut res = HashMap::new();
res.extend(
renames.into_iter()
.map(|(k,v)|
(k, builder.expr().build_lit(P(v.clone())))));
FieldAttrs::new_with_formats(
skip_serializing_field,
default_value,
default_field_name(cx, builder, field.node.kind),
res)
},
(Rename::None, default_value) => {
(Rename::None, default_value, skip_serializing_field) => {
FieldAttrs::new(
skip_serializing_field,
default_value,
default_field_name(cx, builder, field.node.kind))
}