Struct GraphSchema 

pub struct GraphSchema { /* private fields */ }

Schema for a graph collection.

Supports two modes:

• Strict mode: Only predefined node/edge types are allowed.
• Schemaless mode: Any node/edge type is accepted.

Implementations

impl GraphSchema

pub fn new() -> Self

Creates a new strict (non-schemaless) graph schema.

Use with_node_type and with_edge_type to add allowed types.

pub fn schemaless() -> Self

Creates a schemaless graph schema that accepts any types.

pub fn with_node_type(self, node_type: NodeType) -> Self

Adds a node type to the schema (builder pattern).

pub fn with_edge_type(self, edge_type: EdgeType) -> Self

Adds an edge type to the schema (builder pattern).

pub fn is_schemaless(&self) -> bool

Returns whether this schema is schemaless.

pub fn node_types(&self) -> &[NodeType]

Returns all node types in this schema.

pub fn edge_types(&self) -> &[EdgeType]

Returns all edge types in this schema.

pub fn has_node_type(&self, name: &str) -> bool

Checks if a node type exists in this schema.

pub fn has_edge_type(&self, name: &str) -> bool

Checks if an edge type exists in this schema.

pub fn validate_node_type(&self, type_name: &str) -> Result<()>

Validates a node type against this schema.

Returns Ok(()) if the type is valid, or an error with details.

Errors

Returns an error if schema is strict and type_name is not declared.

pub fn validate_edge_type( &self, edge_type: &str, from_type: &str, to_type: &str, ) -> Result<()>

Validates an edge type against this schema.

Checks the edge type name and that source/target node types are valid.

Errors

Returns an error if schema is strict and edge type or endpoint node types violate schema constraints.

pub fn get_node_type(&self, name: &str) -> Option<&NodeType>

Gets a node type by name.

pub fn get_edge_type(&self, name: &str) -> Option<&EdgeType>

Gets an edge type by name.

Trait Implementations

impl Clone for GraphSchema

fn clone(&self) -> GraphSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphSchema

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

Formats the value using the given formatter.

impl Default for GraphSchema

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for GraphSchema

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for GraphSchema

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for GraphSchema

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 GraphSchema