func (c *Context) Fetch(s *gocql.Session) (*gocql.Iter, error) {
stmt, err := c.RenderCQL()
if err != nil {
return nil, err
}
// The reason why this is so dynamic is because of WHERE foo IN (?,?,?) clauses
// The factoring for an IN clause is bad, since we are storing an array into the value
// and using reflection to dig it out again
// This should be more strongly typed
placeHolders := make([]interface{}, 0)
for _, cond := range c.Conditions {
v := cond.Binding.Value
switch reflect.TypeOf(v).Kind() {
case reflect.Slice:
{
s := reflect.ValueOf(v)
for i := 0; i < s.Len(); i++ {
placeHolders = append(placeHolders, s.Index(i).Interface())
}
}
case reflect.Array:
{
// Not really happy about having to special case UUIDs
// but this works for now
if val, ok := v.(gocql.UUID); ok {
placeHolders = append(placeHolders, val.Bytes())
} else {
return nil, bindingErrorf("Cannot bind component: %+v (type: %s)", v, reflect.TypeOf(v))
}
}
default:
{
placeHolders = append(placeHolders, &v)
}
}
}
c.Dispose()
if c.Debug {
fmt.Printf("%+v bound to stmt: %s\n", placeHolders, stmt)
}
iter := s.Query(stmt, placeHolders...).Iter()
return iter, nil
}