51 lines
1.1 KiB
Go
51 lines
1.1 KiB
Go
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package postgresql
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import (
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"git.hexq.cn/tiglog/mydb"
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"git.hexq.cn/tiglog/mydb/internal/sqladapter"
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)
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type collectionAdapter struct {
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}
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func (*collectionAdapter) Insert(col sqladapter.Collection, item interface{}) (interface{}, error) {
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pKey, err := col.PrimaryKeys()
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if err != nil {
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return nil, err
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}
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q := col.SQL().InsertInto(col.Name()).Values(item)
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if len(pKey) == 0 {
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// There is no primary key.
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res, err := q.Exec()
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if err != nil {
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return nil, err
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}
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// Attempt to use LastInsertId() (probably won't work, but the Exec()
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// succeeded, so we can safely ignore the error from LastInsertId()).
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lastID, err := res.LastInsertId()
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if err != nil {
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return nil, nil
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}
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return lastID, nil
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}
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// Asking the database to return the primary key after insertion.
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q = q.Returning(pKey...)
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var keyMap mydb.Cond
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if err := q.Iterator().One(&keyMap); err != nil {
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return nil, err
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}
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// The IDSetter interface does not match, look for another interface match.
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if len(keyMap) == 1 {
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return keyMap[pKey[0]], nil
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}
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// This was a compound key and no interface matched it, let's return a map.
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return keyMap, nil
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}
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