316 lines
9.7 KiB
Go
316 lines
9.7 KiB
Go
/* WIP: A version of the builder which accumulates errors, we'll see if we can't unify the implementations at some point */
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package qgen
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import (
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"database/sql"
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"log"
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"strings"
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)
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var LogPrepares = true
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// So we don't have to do the qgen.Builder.Accumulator() boilerplate all the time
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func NewAcc() *Accumulator {
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return Builder.Accumulator()
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}
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type Accumulator struct {
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conn *sql.DB
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adapter Adapter
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firstErr error
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}
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func (build *Accumulator) SetConn(conn *sql.DB) {
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build.conn = conn
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}
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func (build *Accumulator) SetAdapter(name string) error {
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adap, err := GetAdapter(name)
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if err != nil {
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return err
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}
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build.adapter = adap
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return nil
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}
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func (build *Accumulator) GetAdapter() Adapter {
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return build.adapter
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}
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func (build *Accumulator) FirstError() error {
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return build.firstErr
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}
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func (build *Accumulator) RecordError(err error) {
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if err == nil {
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return
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}
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if build.firstErr == nil {
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build.firstErr = err
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}
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}
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func (build *Accumulator) prepare(res string, err error) *sql.Stmt {
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// TODO: Can we make this less noisy on debug mode?
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if LogPrepares {
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log.Print("res: ", res)
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}
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if err != nil {
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build.RecordError(err)
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return nil
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}
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stmt, err := build.conn.Prepare(res)
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build.RecordError(err)
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return stmt
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}
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func (build *Accumulator) RawPrepare(res string) *sql.Stmt {
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return build.prepare(res, nil)
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}
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func (build *Accumulator) query(query string, args ...interface{}) (rows *sql.Rows, err error) {
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err = build.FirstError()
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if err != nil {
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return rows, err
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}
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return build.conn.Query(query, args...)
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}
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func (build *Accumulator) exec(query string, args ...interface{}) (res sql.Result, err error) {
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err = build.FirstError()
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if err != nil {
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return res, err
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}
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return build.conn.Exec(query, args...)
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}
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func (build *Accumulator) Tx(handler func(*TransactionBuilder) error) {
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tx, err := build.conn.Begin()
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if err != nil {
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build.RecordError(err)
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return
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}
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err = handler(&TransactionBuilder{tx, build.adapter, nil})
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if err != nil {
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tx.Rollback()
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build.RecordError(err)
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return
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}
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build.RecordError(tx.Commit())
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}
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func (build *Accumulator) SimpleSelect(table, columns, where, orderby, limit string) *sql.Stmt {
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return build.prepare(build.adapter.SimpleSelect("", table, columns, where, orderby, limit))
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}
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func (build *Accumulator) SimpleCount(table, where, limit string) *sql.Stmt {
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return build.prepare(build.adapter.SimpleCount("", table, where, limit))
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}
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func (build *Accumulator) SimpleLeftJoin(table1, table2, columns, joiners, where, orderby, limit string) *sql.Stmt {
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return build.prepare(build.adapter.SimpleLeftJoin("", table1, table2, columns, joiners, where, orderby, limit))
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}
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func (build *Accumulator) SimpleInnerJoin(table1, table2, columns, joiners, where, orderby, limit string) *sql.Stmt {
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return build.prepare(build.adapter.SimpleInnerJoin("", table1, table2, columns, joiners, where, orderby, limit))
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}
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func (build *Accumulator) CreateTable(table string, charset string, collation string, columns []DBTableColumn, keys []DBTableKey) *sql.Stmt {
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return build.prepare(build.adapter.CreateTable("", table, charset, collation, columns, keys))
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}
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func (build *Accumulator) SimpleInsert(table, columns, fields string) *sql.Stmt {
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return build.prepare(build.adapter.SimpleInsert("", table, columns, fields))
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}
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func (build *Accumulator) SimpleInsertSelect(ins DBInsert, sel DBSelect) *sql.Stmt {
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return build.prepare(build.adapter.SimpleInsertSelect("", ins, sel))
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}
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func (build *Accumulator) SimpleInsertLeftJoin(ins DBInsert, sel DBJoin) *sql.Stmt {
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return build.prepare(build.adapter.SimpleInsertLeftJoin("", ins, sel))
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}
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func (build *Accumulator) SimpleInsertInnerJoin(ins DBInsert, sel DBJoin) *sql.Stmt {
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return build.prepare(build.adapter.SimpleInsertInnerJoin("", ins, sel))
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}
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func (build *Accumulator) SimpleUpdate(table, set, where string) *sql.Stmt {
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return build.prepare(build.adapter.SimpleUpdate(qUpdate(table, set, where)))
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}
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func (build *Accumulator) SimpleUpdateSelect(table, set, table2, cols, where, orderby, limit string) *sql.Stmt {
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pre := qUpdate(table, set, "").WhereQ(build.GetAdapter().Builder().Select().Table(table2).Columns(cols).Where(where).Orderby(orderby).Limit(limit))
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return build.prepare(build.adapter.SimpleUpdateSelect(pre))
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}
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func (build *Accumulator) SimpleDelete(table, where string) *sql.Stmt {
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return build.prepare(build.adapter.SimpleDelete("", table, where))
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}
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// I don't know why you need this, but here it is x.x
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func (build *Accumulator) Purge(table string) *sql.Stmt {
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return build.prepare(build.adapter.Purge("", table))
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}
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func (build *Accumulator) prepareTx(tx *sql.Tx, res string, err error) (stmt *sql.Stmt) {
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if err != nil {
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build.RecordError(err)
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return nil
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}
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stmt, err = tx.Prepare(res)
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build.RecordError(err)
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return stmt
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}
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// These ones support transactions
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func (build *Accumulator) SimpleSelectTx(tx *sql.Tx, table string, columns string, where string, orderby string, limit string) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleSelect("", table, columns, where, orderby, limit)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleCountTx(tx *sql.Tx, table string, where string, limit string) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleCount("", table, where, limit)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleLeftJoinTx(tx *sql.Tx, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleLeftJoin("", table1, table2, columns, joiners, where, orderby, limit)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleInnerJoinTx(tx *sql.Tx, table1 string, table2 string, columns string, joiners string, where string, orderby string, limit string) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleInnerJoin("", table1, table2, columns, joiners, where, orderby, limit)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) CreateTableTx(tx *sql.Tx, table string, charset string, collation string, columns []DBTableColumn, keys []DBTableKey) (stmt *sql.Stmt) {
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res, err := build.adapter.CreateTable("", table, charset, collation, columns, keys)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleInsertTx(tx *sql.Tx, table string, columns string, fields string) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleInsert("", table, columns, fields)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleInsertSelectTx(tx *sql.Tx, ins DBInsert, sel DBSelect) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleInsertSelect("", ins, sel)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleInsertLeftJoinTx(tx *sql.Tx, ins DBInsert, sel DBJoin) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleInsertLeftJoin("", ins, sel)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleInsertInnerJoinTx(tx *sql.Tx, ins DBInsert, sel DBJoin) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleInsertInnerJoin("", ins, sel)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleUpdateTx(tx *sql.Tx, table string, set string, where string) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleUpdate(qUpdate(table, set, where))
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) SimpleDeleteTx(tx *sql.Tx, table string, where string) (stmt *sql.Stmt) {
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res, err := build.adapter.SimpleDelete("", table, where)
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return build.prepareTx(tx, res, err)
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}
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// I don't know why you need this, but here it is x.x
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func (build *Accumulator) PurgeTx(tx *sql.Tx, table string) (stmt *sql.Stmt) {
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res, err := build.adapter.Purge("", table)
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return build.prepareTx(tx, res, err)
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}
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func (build *Accumulator) Delete(table string) *accDeleteBuilder {
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return &accDeleteBuilder{table, "", nil, build}
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}
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func (build *Accumulator) Update(table string) *accUpdateBuilder {
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return &accUpdateBuilder{qUpdate(table, "", ""), build}
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}
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func (build *Accumulator) Select(table string) *AccSelectBuilder {
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return &AccSelectBuilder{table, "", "", "", "", nil, nil, "", build}
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}
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func (build *Accumulator) Exists(tbl, col string) *AccSelectBuilder {
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return build.Select(tbl).Columns(col).Where(col + "=?")
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}
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func (build *Accumulator) Insert(table string) *accInsertBuilder {
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return &accInsertBuilder{table, "", "", build}
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}
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func (build *Accumulator) Count(table string) *accCountBuilder {
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return &accCountBuilder{table, "", "", nil, nil, "", build}
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}
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type SimpleModel struct {
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delete *sql.Stmt
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create *sql.Stmt
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update *sql.Stmt
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}
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func (build *Accumulator) SimpleModel(tbl, colstr, primary string) SimpleModel {
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var qlist, uplist string
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for _, col := range strings.Split(colstr, ",") {
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qlist += "?,"
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uplist += col + "=?,"
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}
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if len(qlist) > 0 {
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qlist = qlist[0 : len(qlist)-1]
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uplist = uplist[0 : len(uplist)-1]
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}
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where := primary + "=?"
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return SimpleModel{
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delete: build.Delete(tbl).Where(where).Prepare(),
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create: build.Insert(tbl).Columns(colstr).Fields(qlist).Prepare(),
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update: build.Update(tbl).Set(uplist).Where(where).Prepare(),
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}
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}
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func (m SimpleModel) Delete(keyVal interface{}) error {
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_, err := m.delete.Exec(keyVal)
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return err
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}
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func (m SimpleModel) Update(args ...interface{}) error {
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_, err := m.update.Exec(args...)
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return err
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}
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func (m SimpleModel) Create(args ...interface{}) error {
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_, err := m.create.Exec(args...)
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return err
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}
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func (m SimpleModel) CreateID(args ...interface{}) (int, error) {
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res, err := m.create.Exec(args...)
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if err != nil {
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return 0, err
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}
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lastID, err := res.LastInsertId()
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return int(lastID), err
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}
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func (build *Accumulator) Model(table string) *accModelBuilder {
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return &accModelBuilder{table, "", build}
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}
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type accModelBuilder struct {
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table string
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primary string
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build *Accumulator
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}
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func (b *accModelBuilder) Primary(col string) *accModelBuilder {
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b.primary = col
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return b
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}
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