74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
package pgdialect
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import (
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"database/sql"
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"fmt"
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"reflect"
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"github.com/uptrace/bun/schema"
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)
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type HStoreValue struct {
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v reflect.Value
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append schema.AppenderFunc
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scan schema.ScannerFunc
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}
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// HStore accepts a map[string]string and returns a wrapper for working with PostgreSQL
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// hstore data type.
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//
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// For struct fields you can use hstore tag:
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//
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// Attrs map[string]string `bun:",hstore"`
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func HStore(vi interface{}) *HStoreValue {
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v := reflect.ValueOf(vi)
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if !v.IsValid() {
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panic(fmt.Errorf("bun: HStore(nil)"))
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}
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typ := v.Type()
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if typ.Kind() == reflect.Ptr {
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typ = typ.Elem()
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}
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if typ.Kind() != reflect.Map {
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panic(fmt.Errorf("bun: Hstore(unsupported %s)", typ))
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}
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return &HStoreValue{
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v: v,
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append: pgDialect.hstoreAppender(v.Type()),
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scan: hstoreScanner(v.Type()),
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}
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}
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var (
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_ schema.QueryAppender = (*HStoreValue)(nil)
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_ sql.Scanner = (*HStoreValue)(nil)
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)
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func (h *HStoreValue) AppendQuery(fmter schema.Formatter, b []byte) ([]byte, error) {
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if h.append == nil {
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panic(fmt.Errorf("bun: HStore(unsupported %s)", h.v.Type()))
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}
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return h.append(fmter, b, h.v), nil
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}
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func (h *HStoreValue) Scan(src interface{}) error {
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if h.scan == nil {
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return fmt.Errorf("bun: HStore(unsupported %s)", h.v.Type())
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}
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if h.v.Kind() != reflect.Ptr {
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return fmt.Errorf("bun: HStore(non-pointer %s)", h.v.Type())
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}
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return h.scan(h.v.Elem(), src)
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}
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func (h *HStoreValue) Value() interface{} {
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if h.v.IsValid() {
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return h.v.Interface()
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}
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return nil
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}
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