Struct Param 

pub struct Param<V>
where
    V: SurrealQL,
{ /* private fields */ }

A named SurrealQL parameter $name. In inline mode renders as a literal; in param mode (to_surrealql_with_params) renders as $name and collects the value. Use when you want to reference the same value in multiple places or give params meaningful names.

let title = Param::new("search", "hello");
Post::table()
    .project(Post::all())
    .filter(Post::title().eq(title.clone()).or(Post::body().contains(title)))
    .to_surrealql_with_params();
// → ("SELECT * FROM post WHERE title = $search OR body CONTAINS $search",
//    {"search": "hello"})

Implementations

impl<V> Param<V>

where V: SurrealQL,

pub fn new(name: impl Into<String>, value: V) -> Param<V>

Create a named parameter placeholder with the given name and value.

Trait Implementations

impl<V> Clone for Param<V>

where V: Clone + SurrealQL,

fn clone(&self) -> Param<V>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<V> Debug for Param<V>

where V: Debug + SurrealQL,

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

Formats the value using the given formatter.

impl<V> DynExpr for Param<V>

where V: SurrealQL,

fn render_dyn(&self, buf: &mut String)

Append this expression’s SurrealQL to buf with all values inlined.

fn render_dyn_params( &self, buf: &mut String, params: &mut BTreeMap<String, Value>, )

Render with $param placeholders, collecting values into params. Default falls back to inline rendering; Literal nodes override this to emit $pN placeholders and collect their value.