pub struct Context { /* private fields */ }
Expand description

The struct that holds the context of a template rendering.

Light wrapper around a BTreeMap for easier insertions of Serializable values

Implementations

Initializes an empty context

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

Panics if the serialization fails.

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

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

Returns an error if the serialization fails.

let mut context = Context::new();
// user is an instance of a struct implementing `Serialize`
if let Err(_) = context.try_insert("number_users", &user) {
    // Serialization failed
}

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);

Converts the context to a serde_json::Value consuming the context.

Takes a serde-json Value and convert it into a Context with no overhead/cloning.

Takes something that impl Serialize and create 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.

Returns the value at a given key index.

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

Checks if a value exists at a specific index.

Trait Implementations

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more
This method tests for self and other values to be equal, and is used by ==. Read more
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.