Enum webdev_lib::search::NullableSearch

pub enum NullableSearch<T> {
    Partial(T),
    Exact(T),
    Some,
    None,
    NoSearch,
}

Search fo a field that can be null

This could be done as a Search<Option>, but then the cases for Any and None are not entirely clear.

For example, this would make some sense:

PartialSearch(Some(t)) -> Field is not null and partially matches (PartialSearch(T)) ExactSearch(Some(t)) -> Field is not null and fully matches (ExactSearch(T)) PartialSearch(None) -> Field is not null (Some) ExactSearch(None) -> Field is null (None) NoSearch -> Do not search by this field (NoSearch)

but it is not immediatly clear what the PartialSearch(None) and ExactSearch(None) correspond to, and could be confusing and subjective. Instead, we use this enum.

Variants

Partial(T)

Field is not null and partially matches

Exact(T)

Field is not null and exactly matches

Some

Field is not null (Some matches Rust terminology better than NonNull or similar)

None

Field is null (None matches Rust terminology better than Null or similar)

NoSearch

Do not search by this field

Methods

impl<T: FromStr> NullableSearch<T>

pub fn from_query(query: &str) -> Result<NullableSearch<T>, SearchParseError>

Trait Implementations

impl<T: PartialEq> PartialEq<NullableSearch<T>> for NullableSearch<T>

fn eq(&self, other: &NullableSearch<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &NullableSearch<T>) -> bool

This method tests for !=.

impl<T: Debug> Debug for NullableSearch<T>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.