Enum Keys 

pub enum Keys {
    One(String),
    Several(Vec<String>),
}

What a source reads: one document, or several named ones.

Every constructor takes one, and a bare &str or String is Keys::one — so the single-document spelling every caller already wrote keeps working unchanged.

There is no collection variant, and that is a decision rather than an omission: a Firestore document is a section’s contents, so a whole collection folded into one section collides on every field name two documents share. The crate documentation says the whole of it.

Variants

One(String)

One document, whose fields are the whole section.

Several(Vec<String>)

Several named documents, merged in the order given — later wins.

The rule a list of .file(..) calls already teaches: the caller wrote the list, so the list is the precedence. One :batchGet request for the set, put back into call order — the service answers in whatever order it likes, and says so.

Implementations

impl Keys

pub fn one(path: impl Into<String>) -> Self

One document, whose fields are the whole section.

pub fn several<I, S>(paths: I) -> Self

where I: IntoIterator<Item = S>, S: Into<String>,

Several named documents, merged in the order given — later wins.

Trait Implementations

impl Clone for Keys

fn clone(&self) -> Keys

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Keys

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

Formats the value using the given formatter.

impl Eq for Keys

impl From<&String> for Keys

fn from(path: &String) -> Self

Converts to this type from the input type.

impl From<&str> for Keys

fn from(path: &str) -> Self

Converts to this type from the input type.

impl From<String> for Keys

fn from(path: String) -> Self

Converts to this type from the input type.

impl PartialEq for Keys

fn eq(&self, other: &Keys) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Keys