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v/vlib/db/sqlite/orm.v

185 lines
4.8 KiB
V

module sqlite
import orm
import time
// @select is used internally by V's ORM for processing `SELECT ` queries
pub fn (db DB) @select(config orm.SelectConfig, data orm.QueryData, where orm.QueryData) ![][]orm.Primitive {
// 1. Create query and bind necessary data
query := orm.orm_select_gen(config, '`', true, '?', 1, where)
$if trace_sqlite ? {
eprintln('> @select query: "${query}"')
}
stmt := db.new_init_stmt(query)!
defer {
stmt.finalize()
}
mut c := 1
sqlite_stmt_binder(stmt, where, query, mut c)!
sqlite_stmt_binder(stmt, data, query, mut c)!
mut ret := [][]orm.Primitive{}
if config.is_count {
// 2. Get count of returned values & add it to ret array
step := stmt.step()
if step !in [sqlite_row, sqlite_ok, sqlite_done] {
return db.error_message(step, query)
}
count := stmt.sqlite_select_column(0, 8)!
ret << [count]
return ret
}
for {
// 2. Parse returned values
step := stmt.step()
if step == sqlite_done {
break
}
if step != sqlite_ok && step != sqlite_row {
break
}
mut row := []orm.Primitive{}
for i, typ in config.types {
primitive := stmt.sqlite_select_column(i, typ)!
row << primitive
}
ret << row
}
return ret
}
// sql stmt
// insert is used internally by V's ORM for processing `INSERT ` queries
pub fn (db DB) insert(table string, data orm.QueryData) ! {
query, converted_data := orm.orm_stmt_gen(table, '`', .insert, true, '?', 1, data,
orm.QueryData{})
sqlite_stmt_worker(db, query, converted_data, orm.QueryData{})!
}
// update is used internally by V's ORM for processing `UPDATE ` queries
pub fn (db DB) update(table string, data orm.QueryData, where orm.QueryData) ! {
query, _ := orm.orm_stmt_gen(table, '`', .update, true, '?', 1, data, where)
sqlite_stmt_worker(db, query, data, where)!
}
// delete is used internally by V's ORM for processing `DELETE ` queries
pub fn (db DB) delete(table string, where orm.QueryData) ! {
query, _ := orm.orm_stmt_gen(table, '`', .delete, true, '?', 1, orm.QueryData{}, where)
sqlite_stmt_worker(db, query, orm.QueryData{}, where)!
}
// last_id is used internally by V's ORM for post-processing `INSERT ` queries
pub fn (db DB) last_id() int {
query := 'SELECT last_insert_rowid();'
return db.q_int(query)
}
// DDL (table creation/destroying etc)
// create is used internally by V's ORM for processing table creation queries (DDL)
pub fn (db DB) create(table string, fields []orm.TableField) ! {
query := orm.orm_table_gen(table, '`', true, 0, fields, sqlite_type_from_v, false) or {
return err
}
sqlite_stmt_worker(db, query, orm.QueryData{}, orm.QueryData{})!
}
// drop is used internally by V's ORM for processing table destroying queries (DDL)
pub fn (db DB) drop(table string) ! {
query := 'DROP TABLE `${table}`;'
sqlite_stmt_worker(db, query, orm.QueryData{}, orm.QueryData{})!
}
// helper
// Executes query and bind prepared statement data directly
fn sqlite_stmt_worker(db DB, query string, data orm.QueryData, where orm.QueryData) ! {
$if trace_sqlite ? {
eprintln('> sqlite_stmt_worker query: "${query}"')
}
stmt := db.new_init_stmt(query)!
defer {
stmt.finalize()
}
mut c := 1
sqlite_stmt_binder(stmt, data, query, mut c)!
sqlite_stmt_binder(stmt, where, query, mut c)!
stmt.orm_step(query)!
}
// Binds all values of d in the prepared statement
fn sqlite_stmt_binder(stmt Stmt, d orm.QueryData, query string, mut c &int) ! {
for data in d.data {
err := bind(stmt, c, data)
if err != 0 {
return stmt.db.error_message(err, query)
}
c++
}
}
// Universal bind function
fn bind(stmt Stmt, c &int, data orm.Primitive) int {
mut err := 0
match data {
i8, i16, int, u8, u16, u32, bool {
err = stmt.bind_int(c, int(data))
}
i64, u64 {
err = stmt.bind_i64(c, i64(data))
}
f32, f64 {
err = stmt.bind_f64(c, unsafe { *(&f64(&data)) })
}
string {
err = stmt.bind_text(c, data)
}
time.Time {
err = stmt.bind_int(c, int(data.unix))
}
orm.InfixType {
err = bind(stmt, c, data.right)
}
}
return err
}
// Selects column in result and converts it to an orm.Primitive
fn (stmt Stmt) sqlite_select_column(idx int, typ int) !orm.Primitive {
mut primitive := orm.Primitive(0)
if typ in orm.nums || typ == -1 {
primitive = stmt.get_int(idx)
} else if typ in orm.num64 {
primitive = stmt.get_i64(idx)
} else if typ in orm.float {
primitive = stmt.get_f64(idx)
} else if typ == orm.type_string {
primitive = stmt.get_text(idx).clone()
} else if typ == orm.time {
d := stmt.get_int(idx)
primitive = time.unix(d)
} else {
return error('Unknown type ${typ}')
}
return primitive
}
// Convert type int to sql type string
fn sqlite_type_from_v(typ int) !string {
return if typ in orm.nums || typ < 0 || typ in orm.num64 || typ == orm.time {
'INTEGER'
} else if typ in orm.float {
'REAL'
} else if typ == orm.type_string {
'TEXT'
} else {
error('Unknown type ${typ}')
}
}