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"Integers" in column paths fetch a row from a table.

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This commit is contained in:
Andrés N. Robalino 2019-10-30 05:55:26 -05:00
parent 2d44b7d296
commit cea8fab307
1 changed files with 46 additions and 5 deletions
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51
src/data/base.rs
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@ -475,6 +475,13 @@ impl Value {
}
}
pub(crate) fn get_data_by_index(&self, idx: usize) -> Option<&Tagged<Value>> {
match self {
Value::Table(value_set) => value_set.get(idx),
_ => None,
}
}
pub(crate) fn get_data_by_key(&self, name: &str) -> Option<&Tagged<Value>> {
match self {
Value::Row(o) => o.get_data_by_key(name),
@ -526,7 +533,15 @@ impl Value {
) -> Option<Tagged<&Value>> {
let mut current = self;
for p in path {
match current.get_data_by_key(p) {
let value = if p.chars().all(char::is_numeric) {
current.get_data_by_index(p.chars().fold(0 as usize, |acc, c| {
c.to_digit(10).unwrap_or(0) as usize + acc
}))
} else {
current.get_data_by_key(p)
};
match value {
Some(v) => current = v,
None => return None,
}
@ -960,7 +975,7 @@ mod tests {
let (version, tag) = string("0.4.0").into_parts();
let row = Value::row(indexmap! {
let value = Value::row(indexmap! {
"package".into() =>
row(indexmap! {
"name".into() => string("nu"),
@ -969,7 +984,7 @@ mod tests {
});
assert_eq!(
**row.get_data_by_column_path(tag, &field_path).unwrap(),
**value.get_data_by_column_path(tag, &field_path).unwrap(),
version
)
}
@ -980,7 +995,7 @@ mod tests {
let (name, tag) = string("Andrés N. Robalino").into_parts();
let row = Value::row(indexmap! {
let value = Value::row(indexmap! {
"package".into() => row(indexmap! {
"name".into() => string("nu"),
"version".into() => string("0.4.0"),
@ -993,11 +1008,37 @@ mod tests {
});
assert_eq!(
**row.get_data_by_column_path(tag, &field_path).unwrap(),
**value.get_data_by_column_path(tag, &field_path).unwrap(),
name
)
}
#[test]
fn column_path_that_contains_just_a_numbers_gets_a_row_from_a_table() {
let field_path = column_path(&vec![string("package"), string("authors"), string("0")]);
let (_, tag) = string("Andrés N. Robalino").into_parts();
let value = Value::row(indexmap! {
"package".into() => row(indexmap! {
"name".into() => string("nu"),
"version".into() => string("0.4.0"),
"authors".into() => table(&vec![
row(indexmap!{"name".into() => string("Andrés N. Robalino")}),
row(indexmap!{"name".into() => string("Jonathan Turner")}),
row(indexmap!{"name".into() => string("Yehuda Katz")})
])
})
});
assert_eq!(
**value.get_data_by_column_path(tag, &field_path).unwrap(),
Value::row(indexmap! {
"name".into() => string("Andrés N. Robalino")
})
);
}
#[test]
fn replaces_matching_field_from_a_row() {
let field_path = column_path(&vec![string("amigos")]);