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66 lines
1.3 KiB
66 lines
1.3 KiB
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 ArrayValue 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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// Array accepts a slice and returns a wrapper for working with PostgreSQL
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// array data type.
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//
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// For struct fields you can use array tag:
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//
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// Emails []string `bun:",array"`
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func Array(vi interface{}) *ArrayValue {
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v := reflect.ValueOf(vi)
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if !v.IsValid() {
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panic(fmt.Errorf("bun: Array(nil)"))
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}
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return &ArrayValue{
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v: v,
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append: pgDialect.arrayAppender(v.Type()),
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scan: arrayScanner(v.Type()),
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}
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}
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var (
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_ schema.QueryAppender = (*ArrayValue)(nil)
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_ sql.Scanner = (*ArrayValue)(nil)
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)
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func (a *ArrayValue) AppendQuery(fmter schema.Formatter, b []byte) ([]byte, error) {
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if a.append == nil {
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panic(fmt.Errorf("bun: Array(unsupported %s)", a.v.Type()))
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}
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return a.append(fmter, b, a.v), nil
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}
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func (a *ArrayValue) Scan(src interface{}) error {
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if a.scan == nil {
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return fmt.Errorf("bun: Array(unsupported %s)", a.v.Type())
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}
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if a.v.Kind() != reflect.Ptr {
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return fmt.Errorf("bun: Array(non-pointer %s)", a.v.Type())
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}
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return a.scan(a.v, src)
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}
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func (a *ArrayValue) Value() interface{} {
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if a.v.IsValid() {
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return a.v.Interface()
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}
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return nil
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}
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