Struct Context 

pub struct Context { /* private fields */ }

The struct that holds the context of a template rendering.

Light wrapper around a BTreeMap for easier insertions of Serializable values

Implementations

impl Context

pub fn new() -> Self

Initializes an empty context

pub fn from_serialize<T: Serialize + ?Sized>(value: &T) -> TeraResult<Self>

Takes something that implements Serialize and creates a context with it. Meant to be used if you have a hashmap or a struct and don’t want to insert values one by one in the context.

pub fn insert<S: Into<Cow<'static, str>>, T: Serialize + ?Sized>( &mut self, key: S, val: &T, )

Converts the val parameter to Value and insert it into the context.

let mut context = tera::Context::new();
context.insert("number_users", &42);

pub fn insert_value<S: Into<Cow<'static, str>>>(&mut self, key: S, val: Value)

In case you already have a Value you want to insert

pub fn remove(&mut self, key: &str) -> Option<Value>

Remove a key from the context, returning the value at the key if the key was previously inserted into the context.

pub fn extend(&mut self, source: Context)

Appends the data of the source parameter to self, overwriting existing keys. The source context will be dropped.

let mut target = Context::new();
target.insert("a", &1);
target.insert("b", &2);
let mut source = Context::new();
source.insert("b", &3);
source.insert("d", &4);
target.extend(source);

pub fn contains_key(&self, key: &str) -> bool

Checks if a value exists for given key.

pub fn get(&self, key: &str) -> Option<&Value>

Returns the value at the given key

Trait Implementations

impl Clone for Context

fn clone(&self) -> Context

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Context

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

Formats the value using the given formatter.

impl Default for Context

fn default() -> Context

Returns the “default value” for a type.

impl PartialEq for Context

fn eq(&self, other: &Context) -> 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 StructuralPartialEq for Context