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, 432 insertions, 0 deletions

diff --git a/vendor/github.com/uptrace/bun/query_update.go b/vendor/github.com/uptrace/bun/query_update.go
new file mode 100644
index 000000000..ea74e1419
--- /dev/null
+++ b/vendor/github.com/uptrace/bun/query_update.go
@@ -0,0 +1,432 @@
+package bun
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+
+	"github.com/uptrace/bun/dialect/feature"
+	"github.com/uptrace/bun/internal"
+	"github.com/uptrace/bun/schema"
+)
+
+type UpdateQuery struct {
+	whereBaseQuery
+	returningQuery
+	customValueQuery
+	setQuery
+
+	omitZero bool
+}
+
+func NewUpdateQuery(db *DB) *UpdateQuery {
+	q := &UpdateQuery{
+		whereBaseQuery: whereBaseQuery{
+			baseQuery: baseQuery{
+				db:   db,
+				conn: db.DB,
+			},
+		},
+	}
+	return q
+}
+
+func (q *UpdateQuery) Conn(db IConn) *UpdateQuery {
+	q.setConn(db)
+	return q
+}
+
+func (q *UpdateQuery) Model(model interface{}) *UpdateQuery {
+	q.setTableModel(model)
+	return q
+}
+
+// Apply calls the fn passing the SelectQuery as an argument.
+func (q *UpdateQuery) Apply(fn func(*UpdateQuery) *UpdateQuery) *UpdateQuery {
+	return fn(q)
+}
+
+func (q *UpdateQuery) With(name string, query schema.QueryAppender) *UpdateQuery {
+	q.addWith(name, query)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *UpdateQuery) Table(tables ...string) *UpdateQuery {
+	for _, table := range tables {
+		q.addTable(schema.UnsafeIdent(table))
+	}
+	return q
+}
+
+func (q *UpdateQuery) TableExpr(query string, args ...interface{}) *UpdateQuery {
+	q.addTable(schema.SafeQuery(query, args))
+	return q
+}
+
+func (q *UpdateQuery) ModelTableExpr(query string, args ...interface{}) *UpdateQuery {
+	q.modelTable = schema.SafeQuery(query, args)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *UpdateQuery) Column(columns ...string) *UpdateQuery {
+	for _, column := range columns {
+		q.addColumn(schema.UnsafeIdent(column))
+	}
+	return q
+}
+
+func (q *UpdateQuery) ExcludeColumn(columns ...string) *UpdateQuery {
+	q.excludeColumn(columns)
+	return q
+}
+
+func (q *UpdateQuery) Set(query string, args ...interface{}) *UpdateQuery {
+	q.addSet(schema.SafeQuery(query, args))
+	return q
+}
+
+// Value overwrites model value for the column in INSERT and UPDATE queries.
+func (q *UpdateQuery) Value(column string, value string, args ...interface{}) *UpdateQuery {
+	if q.table == nil {
+		q.err = errNilModel
+		return q
+	}
+	q.addValue(q.table, column, value, args)
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+func (q *UpdateQuery) WherePK() *UpdateQuery {
+	q.flags = q.flags.Set(wherePKFlag)
+	return q
+}
+
+func (q *UpdateQuery) Where(query string, args ...interface{}) *UpdateQuery {
+	q.addWhere(schema.SafeQueryWithSep(query, args, " AND "))
+	return q
+}
+
+func (q *UpdateQuery) WhereOr(query string, args ...interface{}) *UpdateQuery {
+	q.addWhere(schema.SafeQueryWithSep(query, args, " OR "))
+	return q
+}
+
+func (q *UpdateQuery) WhereGroup(sep string, fn func(*UpdateQuery) *UpdateQuery) *UpdateQuery {
+	saved := q.where
+	q.where = nil
+
+	q = fn(q)
+
+	where := q.where
+	q.where = saved
+
+	q.addWhereGroup(sep, where)
+
+	return q
+}
+
+func (q *UpdateQuery) WhereDeleted() *UpdateQuery {
+	q.whereDeleted()
+	return q
+}
+
+func (q *UpdateQuery) WhereAllWithDeleted() *UpdateQuery {
+	q.whereAllWithDeleted()
+	return q
+}
+
+//------------------------------------------------------------------------------
+
+// Returning adds a RETURNING clause to the query.
+//
+// To suppress the auto-generated RETURNING clause, use `Returning("NULL")`.
+func (q *UpdateQuery) Returning(query string, args ...interface{}) *UpdateQuery {
+	q.addReturning(schema.SafeQuery(query, args))
+	return q
+}
+
+func (q *UpdateQuery) hasReturning() bool {
+	if !q.db.features.Has(feature.Returning) {
+		return false
+	}
+	return q.returningQuery.hasReturning()
+}
+
+//------------------------------------------------------------------------------
+
+func (q *UpdateQuery) AppendQuery(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	if q.err != nil {
+		return nil, q.err
+	}
+	fmter = formatterWithModel(fmter, q)
+
+	withAlias := fmter.HasFeature(feature.UpdateMultiTable)
+
+	b, err = q.appendWith(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	b = append(b, "UPDATE "...)
+
+	if withAlias {
+		b, err = q.appendTablesWithAlias(fmter, b)
+	} else {
+		b, err = q.appendFirstTableWithAlias(fmter, b)
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	b, err = q.mustAppendSet(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	if !fmter.HasFeature(feature.UpdateMultiTable) {
+		b, err = q.appendOtherTables(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	b, err = q.mustAppendWhere(fmter, b, withAlias)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(q.returning) > 0 {
+		b, err = q.appendReturning(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return b, nil
+}
+
+func (q *UpdateQuery) mustAppendSet(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	b = append(b, " SET "...)
+
+	if len(q.set) > 0 {
+		return q.appendSet(fmter, b)
+	}
+
+	if m, ok := q.model.(*mapModel); ok {
+		return m.appendSet(fmter, b), nil
+	}
+
+	if q.tableModel == nil {
+		return nil, errNilModel
+	}
+
+	switch model := q.tableModel.(type) {
+	case *structTableModel:
+		b, err = q.appendSetStruct(fmter, b, model)
+		if err != nil {
+			return nil, err
+		}
+	case *sliceTableModel:
+		return nil, errors.New("bun: to bulk Update, use CTE and VALUES")
+	default:
+		return nil, fmt.Errorf("bun: Update does not support %T", q.tableModel)
+	}
+
+	return b, nil
+}
+
+func (q *UpdateQuery) appendSetStruct(
+	fmter schema.Formatter, b []byte, model *structTableModel,
+) ([]byte, error) {
+	fields, err := q.getDataFields()
+	if err != nil {
+		return nil, err
+	}
+
+	isTemplate := fmter.IsNop()
+	pos := len(b)
+	for _, f := range fields {
+		if q.omitZero && f.NullZero && f.HasZeroValue(model.strct) {
+			continue
+		}
+
+		if len(b) != pos {
+			b = append(b, ", "...)
+			pos = len(b)
+		}
+
+		b = append(b, f.SQLName...)
+		b = append(b, " = "...)
+
+		if isTemplate {
+			b = append(b, '?')
+			continue
+		}
+
+		app, ok := q.modelValues[f.Name]
+		if ok {
+			b, err = app.AppendQuery(fmter, b)
+			if err != nil {
+				return nil, err
+			}
+		} else {
+			b = f.AppendValue(fmter, b, model.strct)
+		}
+	}
+
+	for i, v := range q.extraValues {
+		if i > 0 || len(fields) > 0 {
+			b = append(b, ", "...)
+		}
+
+		b = append(b, v.column...)
+		b = append(b, " = "...)
+
+		b, err = v.value.AppendQuery(fmter, b)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return b, nil
+}
+
+func (q *UpdateQuery) appendOtherTables(fmter schema.Formatter, b []byte) (_ []byte, err error) {
+	if !q.hasMultiTables() {
+		return b, nil
+	}
+
+	b = append(b, " FROM "...)
+
+	b, err = q.whereBaseQuery.appendOtherTables(fmter, b)
+	if err != nil {
+		return nil, err
+	}
+
+	return b, nil
+}
+
+//------------------------------------------------------------------------------
+
+func (q *UpdateQuery) Bulk() *UpdateQuery {
+	model, ok := q.model.(*sliceTableModel)
+	if !ok {
+		q.setErr(fmt.Errorf("bun: Bulk requires a slice, got %T", q.model))
+		return q
+	}
+
+	return q.With("_data", q.db.NewValues(model)).
+		Model(model).
+		TableExpr("_data").
+		Set(q.updateSliceSet(model)).
+		Where(q.updateSliceWhere(model))
+}
+
+func (q *UpdateQuery) updateSliceSet(model *sliceTableModel) string {
+	var b []byte
+	for i, field := range model.table.DataFields {
+		if i > 0 {
+			b = append(b, ", "...)
+		}
+		if q.db.fmter.HasFeature(feature.UpdateMultiTable) {
+			b = append(b, model.table.SQLAlias...)
+			b = append(b, '.')
+		}
+		b = append(b, field.SQLName...)
+		b = append(b, " = _data."...)
+		b = append(b, field.SQLName...)
+	}
+	return internal.String(b)
+}
+
+func (db *UpdateQuery) updateSliceWhere(model *sliceTableModel) string {
+	var b []byte
+	for i, pk := range model.table.PKs {
+		if i > 0 {
+			b = append(b, " AND "...)
+		}
+		b = append(b, model.table.SQLAlias...)
+		b = append(b, '.')
+		b = append(b, pk.SQLName...)
+		b = append(b, " = _data."...)
+		b = append(b, pk.SQLName...)
+	}
+	return internal.String(b)
+}
+
+//------------------------------------------------------------------------------
+
+func (q *UpdateQuery) Exec(ctx context.Context, dest ...interface{}) (sql.Result, error) {
+	if q.table != nil {
+		if err := q.beforeUpdateHook(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 q.table != nil {
+		if err := q.afterUpdateHook(ctx); err != nil {
+			return nil, err
+		}
+	}
+
+	return res, nil
+}
+
+func (q *UpdateQuery) beforeUpdateHook(ctx context.Context) error {
+	if hook, ok := q.table.ZeroIface.(BeforeUpdateHook); ok {
+		if err := hook.BeforeUpdate(ctx, q); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (q *UpdateQuery) afterUpdateHook(ctx context.Context) error {
+	if hook, ok := q.table.ZeroIface.(AfterUpdateHook); ok {
+		if err := hook.AfterUpdate(ctx, q); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// FQN returns a fully qualified column name. For MySQL, it returns the column name with
+// the table alias. For other RDBMS, it returns just the column name.
+func (q *UpdateQuery) FQN(name string) Ident {
+	if q.db.fmter.HasFeature(feature.UpdateMultiTable) {
+		return Ident(q.table.Alias + "." + name)
+	}
+	return Ident(name)
+}