object

hidden abstract type object

Parent of all object types. An object is a singleton data structure that resides in the SQL database.

Objects are much like entities, with the following restrictions:

• only a single instance is allowed for each definition
• all object attributes must have default values
• object values cannot be created or deleted from code (they are automatically created during blockchain initialization)

Example definition:

object state {
    mutable x: integer = 0;
    mutable s: text = 'n/a';
}

Object attributes are accessed directly:

print(state.x);
print(state.s);

Object values can be modified directly, or with an update statement:

// Direct modification
state.x += 10;
state.s = 'Updated';
// Modification via update statement
update state ( x += 5, s = 'Updated' );

See Also

1. @ operator - Chromia Documentation

Since 0.7.0