agdb 0.12.10

Agnesoft Graph Database
Documentation 
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use crate::DbError;
use crate::DbImpl;
use crate::QueryMut;
use crate::QueryResult;
use crate::StorageData;

/// Query to remove aliases from the database. It
/// is not an error if an alias to be removed already
/// does not exist.
///
/// The result will be a negative number signifying how
/// many aliases have been actually removed.
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "openapi", derive(utoipa::ToSchema))]
#[cfg_attr(feature = "derive", derive(agdb::DbSerialize))]
#[cfg_attr(feature = "api", derive(agdb::TypeDefImpl))]
#[derive(Clone, Debug, PartialEq)]
pub struct RemoveAliasesQuery(pub Vec<String>);

impl QueryMut for RemoveAliasesQuery {
    fn process<Store: StorageData>(&self, db: &mut DbImpl<Store>) -> Result<QueryResult, DbError> {
        let mut result = QueryResult::default();

        for alias in &self.0 {
            if db.remove_alias(alias)? {
                result.result -= 1;
            }
        }

        Ok(result)
    }
}

impl QueryMut for &RemoveAliasesQuery {
    fn process<Store: StorageData>(&self, db: &mut DbImpl<Store>) -> Result<QueryResult, DbError> {
        (*self).process(db)
    }
}