214 lines
4.7 KiB
Go
214 lines
4.7 KiB
Go
package ormtable
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import (
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"context"
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"github.com/cosmos/cosmos-sdk/orm/internal/fieldnames"
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"github.com/cosmos/cosmos-sdk/orm/model/kv"
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"github.com/cosmos/cosmos-sdk/orm/model/ormlist"
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"github.com/cosmos/cosmos-sdk/orm/encoding/encodeutil"
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"google.golang.org/protobuf/proto"
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"google.golang.org/protobuf/reflect/protoreflect"
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"github.com/cosmos/cosmos-sdk/orm/encoding/ormkv"
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"github.com/cosmos/cosmos-sdk/orm/types/ormerrors"
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)
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type uniqueKeyIndex struct {
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*ormkv.UniqueKeyCodec
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fields fieldnames.FieldNames
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primaryKey *primaryKeyIndex
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getReadBackend func(context.Context) (ReadBackend, error)
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}
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func (u uniqueKeyIndex) Iterator(ctx context.Context, options ...ormlist.Option) (Iterator, error) {
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backend, err := u.getReadBackend(ctx)
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if err != nil {
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return nil, err
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}
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return iterator(backend, backend.IndexStoreReader(), u, u.GetKeyCodec(), options)
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}
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func (u uniqueKeyIndex) doNotImplement() {}
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func (u uniqueKeyIndex) Has(ctx context.Context, values ...interface{}) (found bool, err error) {
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backend, err := u.getReadBackend(ctx)
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if err != nil {
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return false, err
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}
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key, err := u.GetKeyCodec().EncodeKey(encodeutil.ValuesOf(values...))
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if err != nil {
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return false, err
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}
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return backend.IndexStoreReader().Has(key)
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}
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func (u uniqueKeyIndex) Get(ctx context.Context, message proto.Message, keyValues ...interface{}) (found bool, err error) {
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backend, err := u.getReadBackend(ctx)
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if err != nil {
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return false, err
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}
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key, err := u.GetKeyCodec().EncodeKey(encodeutil.ValuesOf(keyValues...))
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if err != nil {
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return false, err
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}
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value, err := backend.IndexStoreReader().Get(key)
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if err != nil {
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return false, err
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}
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// for unique keys, value can be empty and the entry still exists
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if value == nil {
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return false, nil
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}
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_, pk, err := u.DecodeIndexKey(key, value)
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if err != nil {
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return true, err
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}
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return u.primaryKey.get(backend, message, pk)
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}
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func (u uniqueKeyIndex) DeleteByKey(ctx context.Context, keyValues ...interface{}) error {
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backend, err := u.getReadBackend(ctx)
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if err != nil {
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return err
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}
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key, err := u.GetKeyCodec().EncodeKey(encodeutil.ValuesOf(keyValues...))
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if err != nil {
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return err
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}
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value, err := backend.IndexStoreReader().Get(key)
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if err != nil {
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return err
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}
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// for unique keys, value can be empty and the entry still exists
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if value == nil {
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return nil
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}
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_, pk, err := u.DecodeIndexKey(key, value)
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if err != nil {
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return err
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}
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return u.primaryKey.doDeleteByKey(ctx, pk)
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}
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func (u uniqueKeyIndex) onInsert(store kv.Store, message protoreflect.Message) error {
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k, v, err := u.EncodeKVFromMessage(message)
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if err != nil {
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return err
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}
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has, err := store.Has(k)
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if err != nil {
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return err
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}
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if has {
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return ormerrors.UniqueKeyViolation
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}
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return store.Set(k, v)
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}
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func (u uniqueKeyIndex) onUpdate(store kv.Store, new, existing protoreflect.Message) error {
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keyCodec := u.GetKeyCodec()
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newValues := keyCodec.GetKeyValues(new)
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existingValues := keyCodec.GetKeyValues(existing)
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if keyCodec.CompareKeys(newValues, existingValues) == 0 {
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return nil
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}
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newKey, err := keyCodec.EncodeKey(newValues)
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if err != nil {
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return err
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}
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has, err := store.Has(newKey)
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if err != nil {
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return err
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}
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if has {
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return ormerrors.UniqueKeyViolation
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}
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existingKey, err := keyCodec.EncodeKey(existingValues)
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if err != nil {
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return err
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}
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err = store.Delete(existingKey)
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if err != nil {
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return err
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}
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_, value, err := u.GetValueCodec().EncodeKeyFromMessage(new)
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if err != nil {
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return err
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}
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return store.Set(newKey, value)
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}
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func (u uniqueKeyIndex) onDelete(store kv.Store, message protoreflect.Message) error {
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_, key, err := u.GetKeyCodec().EncodeKeyFromMessage(message)
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if err != nil {
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return err
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}
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return store.Delete(key)
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}
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func (u uniqueKeyIndex) readValueFromIndexKey(store ReadBackend, primaryKey []protoreflect.Value, _ []byte, message proto.Message) error {
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found, err := u.primaryKey.get(store, message, primaryKey)
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if err != nil {
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return err
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}
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if !found {
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return ormerrors.UnexpectedError.Wrapf("can't find primary key")
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}
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return nil
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}
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func (p uniqueKeyIndex) Fields() string {
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return p.fields.String()
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}
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var _ indexer = &uniqueKeyIndex{}
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var _ UniqueIndex = &uniqueKeyIndex{}
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// isNonTrivialUniqueKey checks if unique key fields are non-trivial, meaning that they
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// don't contain the full primary key. If they contain the full primary key, then
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// we can just use a regular index because there is no new unique constraint.
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func isNonTrivialUniqueKey(fields []protoreflect.Name, primaryKeyFields []protoreflect.Name) bool {
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have := map[protoreflect.Name]bool{}
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for _, field := range fields {
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have[field] = true
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}
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for _, field := range primaryKeyFields {
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if !have[field] {
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return true
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}
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}
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return false
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}
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