head = %Q|
use super::*;
#[cfg(any(feature = "sqlite", feature = "postgres", feature = "mysql"))]
use sqlx::Row as SqlxRow;
|
def blocky(cfg, wheres)
%Q|
#{cfg}
impl Row {
/// gets the value for a column in the row by its name.
/// Errors:
/// * if column missing
/// * if column could not be deserialized into requested type <T>
pub fn get<T>(&self, name: &str) -> Result<T>
where T: #{wheres}
{
match &self.inner {
#[cfg(feature = "sqlite")]
RowInner::Sqlite(r) => Ok(r.try_get(name)?),
#[cfg(feature = "mssql")]
RowInner::Mssql(r) => r.try_get(name),
#[cfg(feature = "postgres")]
RowInner::Postgres(r) => Ok(r.try_get(name)?),
#[cfg(feature = "mysql")]
RowInner::Mysql(r) => Ok(r.try_get(name)?),
}
}
/// gets the value for a column in the row by its index (position, zero based index).
/// Errors:
/// * if column missing, out of bounds
/// * if column could not be deserialized into requested type <T>
pub fn get_by_position<T>(&self, index: usize) -> Result<T>
where T: #{wheres}
{
match &self.inner {
#[cfg(feature = "sqlite")]
RowInner::Sqlite(r) => Ok(r.try_get(index)?),
#[cfg(feature = "mssql")]
RowInner::Mssql(r) => r.try_get_by_posision(index),
#[cfg(feature = "postgres")]
RowInner::Postgres(r) => Ok(r.try_get(index)?),
#[cfg(feature = "mysql")]
RowInner::Mysql(r) => Ok(r.try_get(index)?),
}
}
}
|
end
p = [
["sqlite" , "for<'r> Decode<'r, sqlx::Sqlite> + Type<sqlx::Sqlite>"],
["postgres", "for<'r> Decode<'r, sqlx::Postgres> + Type<sqlx::Postgres>"],
["mysql" , "for<'r> Decode<'r, sqlx::MySql> + Type<sqlx::MySql>"],
["mssql" , "TiberiusDecode"],
]
cc = p.combination(1) + p.combination(2) + p.combination(3) + p.combination(4)
all = ["sqlite", "postgres", "mysql", "mssql"]
full = head
cc.each do |c|
enabled_list = c.map{|a| a[0] }
disabled_list = all - enabled_list
enabled = enabled_list.map{|f| "feature = \"#{f}\""}
disabled = disabled_list.map{|f| "not(feature = \"#{f}\")"}
rules = enabled + disabled
cfgs = "#[cfg(all(#{rules.join(", ")}))]"
wheres = c.map{|a| a[1]}
wheres = wheres.join(" + ")
full = full + "\n\n" + blocky(cfgs, wheres)
end
puts full