Pg to bun (#148)

* start moving to bun

* changing more stuff

* more

* and yet more

* tests passing

* seems stable now

* more big changes

* small fix

* little fixes

1 files changed, 551 insertions, 0 deletions

diff --git a/vendor/github.com/uptrace/bun/query_insert.go b/vendor/github.com/uptrace/bun/query_insert.go
new file mode 100644
index 000000000..efddee407
--- /dev/null
+++ b/vendor/github.com/uptrace/bun/query_insert.go
@@ -0,0 +1,551 @@
+package bun
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"reflect"
+
+	"github.com/uptrace/bun/dialect/feature"
+	"github.com/uptrace/bun/internal"
+	"github.com/uptrace/bun/schema"
+)
+
+type InsertQuery struct {
+	whereBaseQuery
+	returningQuery
+	customValueQuery
+
+	onConflict schema.QueryWithArgs
+	setQuery
+
+	ignore  bool
+	replace bool
+}
+
+func NewInsertQuery(db *DB) *InsertQuery {
+	q := &InsertQuery{
+		whereBaseQuery: whereBaseQuery{
+			baseQuery: baseQuery{
+				db:   db,
+				conn: db.DB,
+			},
+		},
+	}
+	return q
+}
+
+func (q *InsertQuery) Conn(db IConn) *InsertQuery {
+	q.setConn(db)
+	return q
+}
+
+func (q *InsertQuery) Model(model interface{}) *InsertQuery {
+	q.setTableModel(model)
+	return q
+}
+
+// Apply calls the fn passing the SelectQuery as an argument.
+func (q *InsertQuery) Apply(fn func(*InsertQuery) *InsertQuery) *InsertQuery {
+	return fn(q)
+}
+
+func (q *InsertQuery) With(name string, query schema.QueryAppender) *InsertQuery {
+	q.addWith(name, query)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *InsertQuery) Table(tables ...string) *InsertQuery {
+	for _, table := range tables {
+		q.addTable(schema.UnsafeIdent(table))
+	}
+	return q
+}
+
+func (q *InsertQuery) TableExpr(query string, args ...interface{}) *InsertQuery {
+	q.addTable(schema.SafeQuery(query, args))
+	return q
+}
+
+func (q *InsertQuery) ModelTableExpr(query string, args ...interface{}) *InsertQuery {
+	q.modelTable = schema.SafeQuery(query, args)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *InsertQuery) Column(columns ...string) *InsertQuery {
+	for _, column := range columns {
+		q.addColumn(schema.UnsafeIdent(column))
+	}
+	return q
+}
+
+func (q *InsertQuery) ExcludeColumn(columns ...string) *InsertQuery {
+	q.excludeColumn(columns)
+	return q
+}
+
+// Value overwrites model value for the column in INSERT and UPDATE queries.
+func (q *InsertQuery) Value(column string, value string, args ...interface{}) *InsertQuery {
+	if q.table == nil {
+		q.err = errNilModel
+		return q
+	}
+	q.addValue(q.table, column, value, args)
+	return q
+}
+
+func (q *InsertQuery) Where(query string, args ...interface{}) *InsertQuery {
+	q.addWhere(schema.SafeQueryWithSep(query, args, " AND "))
+	return q
+}
+
+func (q *InsertQuery) WhereOr(query string, args ...interface{}) *InsertQuery {
+	q.addWhere(schema.SafeQueryWithSep(query, args, " OR "))
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+// Returning adds a RETURNING clause to the query.
+//
+// To suppress the auto-generated RETURNING clause, use `Returning("NULL")`.
+func (q *InsertQuery) Returning(query string, args ...interface{}) *InsertQuery {
+	q.addReturning(schema.SafeQuery(query, args))
+	return q
+}
+
+func (q *InsertQuery) hasReturning() bool {
+	if !q.db.features.Has(feature.Returning) {
+		return false
+	}
+	return q.returningQuery.hasReturning()
+}
+
+//------------------------------------------------------------------------------
+
+// Ignore generates an `INSERT IGNORE INTO` query (MySQL).
+func (q *InsertQuery) Ignore() *InsertQuery {
+	q.ignore = true
+	return q
+}
+
+// Replaces generates a `REPLACE INTO` query (MySQL).
+func (q *InsertQuery) Replace() *InsertQuery {
+	q.replace = true
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *InsertQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	if q.err != nil {
+		return nil, q.err
+	}
+	fmter = formatterWithModel(fmter, q)
+
+	b, err = q.appendWith(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	if q.replace {
+		b = append(b, "REPLACE "...)
+	} else {
+		b = append(b, "INSERT "...)
+		if q.ignore {
+			b = append(b, "IGNORE "...)
+		}
+	}
+	b = append(b, "INTO "...)
+
+	if q.db.features.Has(feature.InsertTableAlias) && !q.onConflict.IsZero() {
+		b, err = q.appendFirstTableWithAlias(fmter, b)
+	} else {
+		b, err = q.appendFirstTable(fmter, b)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	b, err = q.appendColumnsValues(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	b, err = q.appendOn(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	if q.hasReturning() {
+		b, err = q.appendReturning(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return b, nil
+}
+
+func (q *InsertQuery) appendColumnsValues(
+	fmter schema.Formatter, b []byte,
+) (_ []byte, err error) {
+	if q.hasMultiTables() {
+		if q.columns != nil {
+			b = append(b, " ("...)
+			b, err = q.appendColumns(fmter, b)
+			if err != nil {
+				return nil, err
+			}
+			b = append(b, ")"...)
+		}
+
+		b = append(b, " SELECT * FROM "...)
+		b, err = q.appendOtherTables(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+
+		return b, nil
+	}
+
+	if m, ok := q.model.(*mapModel); ok {
+		return m.appendColumnsValues(fmter, b), nil
+	}
+	if _, ok := q.model.(*mapSliceModel); ok {
+		return nil, fmt.Errorf("Insert(*[]map[string]interface{}) is not supported")
+	}
+
+	if q.model == nil {
+		return nil, errNilModel
+	}
+
+	fields, err := q.getFields()
+	if err != nil {
+		return nil, err
+	}
+
+	b = append(b, " ("...)
+	b = q.appendFields(fmter, b, fields)
+	b = append(b, ") VALUES ("...)
+
+	switch model := q.tableModel.(type) {
+	case *structTableModel:
+		b, err = q.appendStructValues(fmter, b, fields, model.strct)
+		if err != nil {
+			return nil, err
+		}
+	case *sliceTableModel:
+		b, err = q.appendSliceValues(fmter, b, fields, model.slice)
+		if err != nil {
+			return nil, err
+		}
+	default:
+		return nil, fmt.Errorf("bun: Insert does not support %T", q.tableModel)
+	}
+
+	b = append(b, ')')
+
+	return b, nil
+}
+
+func (q *InsertQuery) appendStructValues(
+	fmter schema.Formatter, b []byte, fields []*schema.Field, strct reflect.Value,
+) (_ []byte, err error) {
+	isTemplate := fmter.IsNop()
+	for i, f := range fields {
+		if i > 0 {
+			b = append(b, ", "...)
+		}
+
+		app, ok := q.modelValues[f.Name]
+		if ok {
+			b, err = app.AppendQuery(fmter, b)
+			if err != nil {
+				return nil, err
+			}
+			q.addReturningField(f)
+			continue
+		}
+
+		switch {
+		case isTemplate:
+			b = append(b, '?')
+		case f.NullZero && f.HasZeroValue(strct):
+			if q.db.features.Has(feature.DefaultPlaceholder) {
+				b = append(b, "DEFAULT"...)
+			} else if f.SQLDefault != "" {
+				b = append(b, f.SQLDefault...)
+			} else {
+				b = append(b, "NULL"...)
+			}
+			q.addReturningField(f)
+		default:
+			b = f.AppendValue(fmter, b, strct)
+		}
+	}
+
+	for i, v := range q.extraValues {
+		if i > 0 || len(fields) > 0 {
+			b = append(b, ", "...)
+		}
+
+		b, err = v.value.AppendQuery(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return b, nil
+}
+
+func (q *InsertQuery) appendSliceValues(
+	fmter schema.Formatter, b []byte, fields []*schema.Field, slice reflect.Value,
+) (_ []byte, err error) {
+	if fmter.IsNop() {
+		return q.appendStructValues(fmter, b, fields, reflect.Value{})
+	}
+
+	sliceLen := slice.Len()
+	for i := 0; i < sliceLen; i++ {
+		if i > 0 {
+			b = append(b, "), ("...)
+		}
+		el := indirect(slice.Index(i))
+		b, err = q.appendStructValues(fmter, b, fields, el)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	for i, v := range q.extraValues {
+		if i > 0 || len(fields) > 0 {
+			b = append(b, ", "...)
+		}
+
+		b, err = v.value.AppendQuery(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return b, nil
+}
+
+func (q *InsertQuery) getFields() ([]*schema.Field, error) {
+	if q.db.features.Has(feature.DefaultPlaceholder) || len(q.columns) > 0 {
+		return q.baseQuery.getFields()
+	}
+
+	var strct reflect.Value
+
+	switch model := q.tableModel.(type) {
+	case *structTableModel:
+		strct = model.strct
+	case *sliceTableModel:
+		if model.sliceLen == 0 {
+			return nil, fmt.Errorf("bun: Insert(empty %T)", model.slice.Type())
+		}
+		strct = indirect(model.slice.Index(0))
+	}
+
+	fields := make([]*schema.Field, 0, len(q.table.Fields))
+
+	for _, f := range q.table.Fields {
+		if f.NotNull && f.NullZero && f.SQLDefault == "" && f.HasZeroValue(strct) {
+			q.addReturningField(f)
+			continue
+		}
+		fields = append(fields, f)
+	}
+
+	return fields, nil
+}
+
+func (q *InsertQuery) appendFields(
+	fmter schema.Formatter, b []byte, fields []*schema.Field,
+) []byte {
+	b = appendColumns(b, "", fields)
+	for i, v := range q.extraValues {
+		if i > 0 || len(fields) > 0 {
+			b = append(b, ", "...)
+		}
+		b = fmter.AppendIdent(b, v.column)
+	}
+	return b
+}
+
+//------------------------------------------------------------------------------
+
+func (q *InsertQuery) On(s string, args ...interface{}) *InsertQuery {
+	q.onConflict = schema.SafeQuery(s, args)
+	return q
+}
+
+func (q *InsertQuery) Set(query string, args ...interface{}) *InsertQuery {
+	q.addSet(schema.SafeQuery(query, args))
+	return q
+}
+
+func (q *InsertQuery) appendOn(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	if q.onConflict.IsZero() {
+		return b, nil
+	}
+
+	b = append(b, " ON "...)
+	b, err = q.onConflict.AppendQuery(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(q.set) > 0 {
+		if fmter.HasFeature(feature.OnDuplicateKey) {
+			b = append(b, ' ')
+		} else {
+			b = append(b, " SET "...)
+		}
+
+		b, err = q.appendSet(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	} else if len(q.columns) > 0 {
+		fields, err := q.getDataFields()
+		if err != nil {
+			return nil, err
+		}
+
+		if len(fields) == 0 {
+			fields = q.tableModel.Table().DataFields
+		}
+
+		b = q.appendSetExcluded(b, fields)
+	}
+
+	b, err = q.appendWhere(fmter, b, true)
+	if err != nil {
+		return nil, err
+	}
+
+	return b, nil
+}
+
+func (q *InsertQuery) appendSetExcluded(b []byte, fields []*schema.Field) []byte {
+	b = append(b, " SET "...)
+	for i, f := range fields {
+		if i > 0 {
+			b = append(b, ", "...)
+		}
+		b = append(b, f.SQLName...)
+		b = append(b, " = EXCLUDED."...)
+		b = append(b, f.SQLName...)
+	}
+	return b
+}
+
+//------------------------------------------------------------------------------
+
+func (q *InsertQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
+	if q.table != nil {
+		if err := q.beforeInsertHook(ctx); err != nil {
+			return nil, err
+		}
+	}
+
+	queryBytes, err := q.AppendQuery(q.db.fmter, q.db.makeQueryBytes())
+	if err != nil {
+		return nil, err
+	}
+
+	query := internal.String(queryBytes)
+	var res sql.Result
+
+	if hasDest := len(dest) > 0; hasDest || q.hasReturning() {
+		model, err := q.getModel(dest)
+		if err != nil {
+			return nil, err
+		}
+
+		res, err = q.scan(ctx, q, query, model, hasDest)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		res, err = q.exec(ctx, q, query)
+		if err != nil {
+			return nil, err
+		}
+
+		if err := q.tryLastInsertID(res, dest); err != nil {
+			return nil, err
+		}
+	}
+
+	if q.table != nil {
+		if err := q.afterInsertHook(ctx); err != nil {
+			return nil, err
+		}
+	}
+
+	return res, nil
+}
+
+func (q *InsertQuery) beforeInsertHook(ctx context.Context) error {
+	if hook, ok := q.table.ZeroIface.(BeforeInsertHook); ok {
+		if err := hook.BeforeInsert(ctx, q); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (q *InsertQuery) afterInsertHook(ctx context.Context) error {
+	if hook, ok := q.table.ZeroIface.(AfterInsertHook); ok {
+		if err := hook.AfterInsert(ctx, q); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (q *InsertQuery) tryLastInsertID(res sql.Result, dest []interface{}) error {
+	if q.db.features.Has(feature.Returning) || q.table == nil || len(q.table.PKs) != 1 {
+		return nil
+	}
+
+	id, err := res.LastInsertId()
+	if err != nil {
+		return err
+	}
+	if id == 0 {
+		return nil
+	}
+
+	model, err := q.getModel(dest)
+	if err != nil {
+		return err
+	}
+
+	pk := q.table.PKs[0]
+	switch model := model.(type) {
+	case *structTableModel:
+		if err := pk.ScanValue(model.strct, id); err != nil {
+			return err
+		}
+	case *sliceTableModel:
+		sliceLen := model.slice.Len()
+		for i := 0; i < sliceLen; i++ {
+			strct := indirect(model.slice.Index(i))
+			if err := pk.ScanValue(strct, id); err != nil {
+				return err
+			}
+			id++
+		}
+	}
+
+	return nil
+}