Struct UpdateSets

pub struct UpdateSets { /* private fields */ }

Represents a collection of update sets.

Update sets are used to define the values to be updated in a database table.

Example

use safety_postgres::access::sql_base::UpdateSets;

let mut update_sets = UpdateSets::new();

update_sets.add_set("column1", "value1").expect("adding update set failed");
update_sets.add_set("column2", "value2").expect("adding update set failed");

let update_set_text = update_sets.get_update_text();

assert_eq!(update_set_text, "UPDATE main_table_name SET column1 = value1, column2 = value2");

Implementations

impl UpdateSets

pub fn new() -> Self

Creates a new instance of the UpdateSets struct.

pub fn add_set( &mut self, column: &str, value: &str, ) -> Result<&mut Self, UpdateSetError>

Adds a set of column-value pair to the update sets of the struct.

Arguments

• column - The name of the column to be updated.
• value - The new value for the column.

Errors

Returns an UpdateSetError if the column is not a valid string.

Returns

A mutable reference to Self (UpdateSets) on success.

Example

use safety_postgres::access::sql_base::UpdateSets;

let mut update_sets = UpdateSets::new();
update_sets.add_set("name", "John").expect("adding update set failed");

pub fn get_update_text(&self) -> String

Returns the update text for the set parameters.

pub fn get_num_values(&self) -> usize

Returns the number of values in the update sets.

Returns

The number of values in the update sets.

Trait Implementations

impl Clone for UpdateSets

fn clone(&self) -> UpdateSets

Returns a copy of the value.

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

Performs copy-assignment from source.