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

vendor/github.com/uptrace/bun/model_table_slice.go

@@ -0,0 +1,113 @@
+package bun
+
+import (
+	"context"
+	"database/sql"
+	"reflect"
+
+	"github.com/uptrace/bun/schema"
+)
+
+type sliceTableModel struct {
+	structTableModel
+
+	slice      reflect.Value
+	sliceLen   int
+	sliceOfPtr bool
+	nextElem   func() reflect.Value
+}
+
+var _ tableModel = (*sliceTableModel)(nil)
+
+func newSliceTableModel(
+	db *DB, dest interface{}, slice reflect.Value, elemType reflect.Type,
+) *sliceTableModel {
+	m := &sliceTableModel{
+		structTableModel: structTableModel{
+			db:    db,
+			table: db.Table(elemType),
+			dest:  dest,
+			root:  slice,
+		},
+
+		slice:    slice,
+		sliceLen: slice.Len(),
+		nextElem: makeSliceNextElemFunc(slice),
+	}
+	m.init(slice.Type())
+	return m
+}
+
+func (m *sliceTableModel) init(sliceType reflect.Type) {
+	switch sliceType.Elem().Kind() {
+	case reflect.Ptr, reflect.Interface:
+		m.sliceOfPtr = true
+	}
+}
+
+func (m *sliceTableModel) Join(name string, apply func(*SelectQuery) *SelectQuery) *join {
+	return m.join(m.slice, name, apply)
+}
+
+func (m *sliceTableModel) Bind(bind reflect.Value) {
+	m.slice = bind.Field(m.index[len(m.index)-1])
+}
+
+func (m *sliceTableModel) SetCap(cap int) {
+	if cap > 100 {
+		cap = 100
+	}
+	if m.slice.Cap() < cap {
+		m.slice.Set(reflect.MakeSlice(m.slice.Type(), 0, cap))
+	}
+}
+
+func (m *sliceTableModel) ScanRows(ctx context.Context, rows *sql.Rows) (int, error) {
+	columns, err := rows.Columns()
+	if err != nil {
+		return 0, err
+	}
+
+	m.columns = columns
+	dest := makeDest(m, len(columns))
+
+	if m.slice.IsValid() && m.slice.Len() > 0 {
+		m.slice.Set(m.slice.Slice(0, 0))
+	}
+
+	var n int
+
+	for rows.Next() {
+		m.strct = m.nextElem()
+		m.structInited = false
+
+		if err := m.scanRow(ctx, rows, dest); err != nil {
+			return 0, err
+		}
+
+		n++
+	}
+	if err := rows.Err(); err != nil {
+		return 0, err
+	}
+
+	return n, nil
+}
+
+// Inherit these hooks from structTableModel.
+var (
+	_ schema.BeforeScanHook = (*sliceTableModel)(nil)
+	_ schema.AfterScanHook  = (*sliceTableModel)(nil)
+)
+
+func (m *sliceTableModel) updateSoftDeleteField() error {
+	sliceLen := m.slice.Len()
+	for i := 0; i < sliceLen; i++ {
+		strct := indirect(m.slice.Index(i))
+		fv := m.table.SoftDeleteField.Value(strct)
+		if err := m.table.UpdateSoftDeleteField(fv); err != nil {
+			return err
+		}
+	}
+	return nil
+}