Struct Schema 

pub struct Schema {
    pub name: String,
    pub pk: String,
    pub required_fields: HashSet<String>,
    pub types: HashMap<String, Type>,
    pub defaults: HashMap<String, Value>,
}

The Schema struct represents the schema of a table in the database

Fields

• name - the name of the table
• pk - the name of the primary key
  • currently only single primary key is supported
• required_fields - the names of the required fields (especially needed in write operations), it includes 2 cases:
  • the field is required (cannot be NULL)
  • the field is pk (primary key)
• types - the data types of the columns in the table
• defaults - the default values for the columns in the table

Fields

name: String

pk: String

required_fields: HashSet<String>

types: HashMap<String, Type>

defaults: HashMap<String, Value>

Implementations

impl Schema

pub fn find_unknown_field(&self, challenges: &[&str]) -> Option<String>

Check if a given column is defined by the schema

pub fn json(&self) -> Result<Value>

create a new Schema instance as a representation of a table in the database which can be consumed by clients such as web applications

Trait Implementations

impl Clone for Schema

fn clone(&self) -> Schema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Schema

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

Formats the value using the given formatter.

impl PartialEq for Schema

fn eq(&self, other: &Schema) -> 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 Schema