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v/vlib/pg/orm.v
2021-08-03 05:17:00 +03:00

273 lines
5.6 KiB
V

module pg
import orm
import time
import net.conv
// sql expr
pub fn (db DB) @select(config orm.SelectConfig, data orm.QueryData, where orm.QueryData) ?[][]orm.Primitive {
query := orm.orm_select_gen(config, '"', true, '$', 1, where)
mut ret := [][]orm.Primitive{}
res := pg_stmt_worker(db, query, orm.QueryData{}, where) ?
for row in res {
mut row_data := []orm.Primitive{}
for i, val in row.vals {
field := str_to_primitive(val, config.types[i]) ?
row_data << field
}
ret << row_data
}
return ret
}
// sql stmt
pub fn (db DB) insert(table string, data orm.QueryData) ? {
query := orm.orm_stmt_gen(table, '"', .insert, true, '$', 1, data, orm.QueryData{})
pg_stmt_worker(db, query, data, orm.QueryData{}) ?
}
pub fn (db DB) update(table string, data orm.QueryData, where orm.QueryData) ? {
query := orm.orm_stmt_gen(table, '"', .update, true, '$', 1, data, where)
pg_stmt_worker(db, query, data, where) ?
}
pub fn (db DB) delete(table string, where orm.QueryData) ? {
query := orm.orm_stmt_gen(table, '"', .delete, true, '$', 1, orm.QueryData{}, where)
pg_stmt_worker(db, query, orm.QueryData{}, where) ?
}
pub fn (db DB) last_id() orm.Primitive {
query := 'SELECT LASTVAL();'
id := db.q_int(query) or { 0 }
return orm.Primitive(id)
}
// table
pub fn (db DB) create(table string, fields []orm.TableField) ? {
query := orm.orm_table_gen(table, '"', true, 0, fields, pg_type_from_v, false) or { return err }
pg_stmt_worker(db, query, orm.QueryData{}, orm.QueryData{}) ?
}
pub fn (db DB) drop(table string) ? {
query := 'DROP TABLE "$table";'
pg_stmt_worker(db, query, orm.QueryData{}, orm.QueryData{}) ?
}
// utils
fn pg_stmt_worker(db DB, query string, data orm.QueryData, where orm.QueryData) ?[]Row {
mut param_types := []u32{}
mut param_vals := []&char{}
mut param_lens := []int{}
mut param_formats := []int{}
pg_stmt_binder(mut param_types, mut param_vals, mut param_lens, mut param_formats,
data)
pg_stmt_binder(mut param_types, mut param_vals, mut param_lens, mut param_formats,
where)
res := C.PQexecParams(db.conn, query.str, param_vals.len, param_types.data, param_vals.data,
param_lens.data, param_formats.data, 0)
return db.handle_error_or_result(res, 'orm_stmt_worker')
}
fn pg_stmt_binder(mut types []u32, mut vals []&char, mut lens []int, mut formats []int, d orm.QueryData) {
for data in d.data {
pg_stmt_match(mut types, mut vals, mut lens, mut formats, data)
}
}
fn pg_stmt_match(mut types []u32, mut vals []&char, mut lens []int, mut formats []int, data orm.Primitive) {
d := data
match data {
bool {
types << u32(Oid.t_bool)
vals << &char(&(d as bool))
lens << int(sizeof(bool))
formats << 1
}
byte {
types << u32(Oid.t_char)
vals << &char(&(d as byte))
lens << int(sizeof(byte))
formats << 1
}
u16 {
types << u32(Oid.t_int2)
num := conv.htn16(&data)
vals << &char(&num)
lens << int(sizeof(u16))
formats << 1
}
u32 {
types << u32(Oid.t_int4)
num := conv.htn32(&data)
vals << &char(&num)
lens << int(sizeof(u32))
formats << 1
}
u64 {
types << u32(Oid.t_int8)
num := conv.htn64(&data)
vals << &char(&num)
lens << int(sizeof(u64))
formats << 1
}
i8 {
types << u32(Oid.t_char)
vals << &char(&(d as i8))
lens << int(sizeof(i8))
formats << 1
}
i16 {
types << u32(Oid.t_int2)
num := conv.htn16(unsafe { &u16(&data) })
vals << &char(&num)
lens << int(sizeof(i16))
formats << 1
}
int {
types << u32(Oid.t_int4)
num := conv.htn32(unsafe { &u32(&data) })
vals << &char(&num)
lens << int(sizeof(int))
formats << 1
}
i64 {
types << u32(Oid.t_int8)
num := conv.htn64(unsafe { &u64(&data) })
vals << &char(&num)
lens << int(sizeof(i64))
formats << 1
}
f32 {
types << u32(Oid.t_float4)
vals << &char(unsafe { &f32(&(d as f32)) })
lens << int(sizeof(f32))
formats << 1
}
f64 {
types << u32(Oid.t_float8)
vals << &char(unsafe { &f64(&(d as f64)) })
lens << int(sizeof(f64))
formats << 1
}
string {
types << u32(Oid.t_text)
vals << data.str
lens << data.len
formats << 0
}
time.Time {
types << u32(Oid.t_int4)
vals << &char(&int(data.unix))
lens << int(sizeof(u32))
formats << 1
}
orm.InfixType {
pg_stmt_match(mut types, mut vals, mut lens, mut formats, data.right)
}
}
}
fn pg_type_from_v(typ int) ?string {
str := match typ {
6, 10 {
'SMALLINT'
}
7, 11, orm.time {
'INT'
}
8, 12 {
'BIGINT'
}
13 {
'REAL'
}
14 {
'DOUBLE PRECISION'
}
orm.string {
'TEXT'
}
-1 {
'SERIAL'
}
else {
''
}
}
if str == '' {
return error('Unknown type $typ')
}
return str
}
fn str_to_primitive(str string, typ int) ?orm.Primitive {
match typ {
// bool
16 {
return orm.Primitive(str.i8() == 1)
}
// i8
5 {
return orm.Primitive(str.i8())
}
// i16
6 {
return orm.Primitive(str.i16())
}
// int
7 {
return orm.Primitive(str.int())
}
// i64
8 {
return orm.Primitive(str.i64())
}
// byte
9 {
data := str.i8()
return orm.Primitive(*unsafe { &byte(&data) })
}
// u16
10 {
data := str.i16()
return orm.Primitive(*unsafe { &u16(&data) })
}
// u32
11 {
data := str.int()
return orm.Primitive(*unsafe { &u32(&data) })
}
// u64
12 {
data := str.i64()
return orm.Primitive(*unsafe { &u64(&data) })
}
// f32
13 {
return orm.Primitive(str.f32())
}
// f64
14 {
return orm.Primitive(str.f64())
}
orm.string {
return orm.Primitive(str)
}
orm.time {
timestamp := str.int()
return orm.Primitive(time.unix(timestamp))
}
else {}
}
return error('Unknown field type $typ')
}