Struct ContentId 

pub struct ContentId(/* private fields */);

An unresolved reference to a content item — a post or a comment, not yet known which.

This is the wire type. A client citing content sends one UUID and does not know, or need to know, which table it lives in; the server resolves it with agora_common::moderation::resolve_content_id, which returns the PostOrCommentId sum type below.

So the two are a pair, and the distinction is the point:

• ContentId — “an id someone handed us.” Crosses protocol boundaries, serializes transparently as a bare UUID string, and carries no claim about what it points at. May not resolve at all.
• PostOrCommentId — “an id we have resolved.” Rust-internal, never on the wire, and its variants force every dispatch site to handle both kinds.

Resolve at the boundary, then work with the sum type. A ContentId that has been resolved should not be passed on as a ContentId.

Implementations

impl ContentId

pub fn new() -> Self

Create a new random ID.

pub fn as_uuid(&self) -> &Uuid

Get the inner UUID reference.

Trait Implementations

impl Clone for ContentId

fn clone(&self) -> ContentId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ContentId

impl Debug for ContentId

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

Formats the value using the given formatter.

impl Default for ContentId

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ContentId

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for ContentId

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

Formats the value using the given formatter.

impl Eq for ContentId

impl From<CommentId> for ContentId

fn from(id: CommentId) -> Self

Converts to this type from the input type.

impl From<ContentId> for Uuid

fn from(id: ContentId) -> Self

Converts to this type from the input type.

impl From<ContentId> for ModerationTargetId

Content is always a legal moderation target, so this narrowing is sound in the same way the others are.

fn from(id: ContentId) -> Self

Converts to this type from the input type.

impl From<PostId> for ContentId

A ContentId can be produced from anything already known to be content — narrowing to “an id” from “an id we resolved” is always sound. The reverse needs a database lookup and is resolve_content_id’s job, which is why there is no From for it.

fn from(id: PostId) -> Self

Converts to this type from the input type.

impl From<PostOrCommentId> for ContentId

fn from(id: PostOrCommentId) -> Self

Converts to this type from the input type.

impl From<Uuid> for ContentId

fn from(uuid: Uuid) -> Self

Converts to this type from the input type.

impl FromStr for ContentId

Every id round-trips through its own Display.

Without this, anything that parses an id from a string — clap value_parsers, query strings, config files — has to widen the field back to a bare Uuid at the boundary and convert by hand, which is the exact laundering the newtype exists to prevent. agora-cli carried a hand-written parse_moderation_action_id for precisely this reason.

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for ContentId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ContentId

fn cmp(&self, other: &ContentId) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for ContentId

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for ContentId

fn partial_cmp(&self, other: &ContentId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for ContentId

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ContentId