use crate::error::Error;
use crate::postgres::query_table::{QueryTables, QueryTable};
use crate::postgres::query_field::{QueryWithParams, ParameterValueAsRef};
use crate::postgres::query_token::{QueryTokens, QueryToken, FormatQueryTup};
use crate::postgres::query_set::{QuerySets};
use crate::postgres::query_return::{QueryReturns, QueryReturnField};
#[derive(Default, Debug)]
pub struct SqlInsert<'a> {
_tables: QueryTables, _sets: QuerySets,
_returns: QueryReturns,
_parameters: Vec<ParameterValueAsRef<'a>>,
}
impl<'a> SqlInsert<'a> {
pub fn new() -> SqlInsert<'static> {
SqlInsert::default()
}
pub fn build(&self) -> Result<QueryWithParams, Error> {
let mut param_iter = 1;
if self._tables.len() != 1 {
return Err(Error::Syntax("insert can only have 1 table".to_owned()))
}
let mut vec: Vec<String> = Vec::new();
let built_for_table = self._tables.build(&mut param_iter)?;
let built_for_create = self._sets.build_for_create(&mut param_iter)?;
let mut p: Vec<ParameterValueAsRef> = Vec::new();
for ploc in built_for_table.parameters_loc {
p.push(self._parameters[ploc]);
}
for ploc in built_for_create.parameters_loc {
p.push(self._parameters[ploc]);
}
vec.push(format!("INSERT INTO {}{}", built_for_table.query, built_for_create.query));
if self._returns.len() > 0 {
let built_for_return: String = self._returns.build()?;
vec.push(format!("RETURNING {}", built_for_return));
}
Ok(QueryWithParams {
query: vec.join(" "),
parameters: p,
})
}
pub fn returning<S: Into<QueryReturnField>>(&mut self, field: S) -> &mut Self {
self._returns.push(field.into());
self
}
pub fn table<S: Into<QueryTable>>(&mut self, table: S) -> &mut Self {
self._tables.push(table.into());
self
}
pub fn set<S: Into<String>, T>(&mut self, field: S, param: &'a T) -> &mut Self where T: postgres_types::ToSql + std::marker::Sync + 'a {
self._parameters.push(param);
self._sets.set((field.into(), QueryTokens(vec![QueryToken::ParameterLoc(self._parameters.len() - 1)])));
self
}
pub fn set_raw<S: Into<String>>(&mut self, field: S, tup: FormatQueryTup<'a>) -> &mut Self{
let len = self._parameters.len();
self._parameters.extend(tup.1);
let qtokens = (tup.0).to_query_tokens(len);
self._sets.set((field.into(), qtokens));
self
}
}
#[cfg(test)]
mod tests {
use crate::postgres::query_token::{format_query};
use super::*;
#[test]
fn test_insert_builder_1() {
let user_spouse: Option<String> = None;
let mut sql_insert = SqlInsert::new();
let qbuild = sql_insert
.set("spouse", &user_spouse)
.returning("id")
.returning("age")
.table("user")
.set("age", &1337)
.set_raw("name", format_query("LOWER({})".to_owned(), vec![&("foo")]))
.build().unwrap();
assert_eq!(qbuild.query, "INSERT INTO \"user\"(\"spouse\",\"age\",\"name\") VALUES ($1,$2,LOWER($3)) RETURNING id, age");
assert_eq!(format!("{:?}", qbuild.parameters), "[None, 1337, \"foo\"]");
}
}