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package gorm
import (
"database/sql"
"fmt"
)
// Define callbacks for row query
func init() {
DefaultCallback.RowQuery().Register("gorm:row_query", rowQueryCallback)
}
type RowQueryResult struct {
Row *sql.Row
}
type RowsQueryResult struct {
Rows *sql.Rows
Error error
}
// queryCallback used to query data from database
func rowQueryCallback(scope *Scope) {
if result, ok := scope.InstanceGet("row_query_result"); ok {
scope.prepareQuerySQL()
if str, ok := scope.Get("gorm:query_hint"); ok {
scope.SQL = fmt.Sprint(str) + scope.SQL
}
if rowResult, ok := result.(*RowQueryResult); ok {
rowResult.Row = scope.SQLDB().QueryRow(scope.SQL, scope.SQLVars...)
} else if rowsResult, ok := result.(*RowsQueryResult); ok {
rowsResult.Rows, rowsResult.Error = scope.SQLDB().Query(scope.SQL, scope.SQLVars...)
}
}
}
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