/// <summary>
/// 预处理：字段值－字典
/// </summary>
/// <param name="builder">构造缓存。</param>
/// <param name="name">字段名称。</param>
/// <param name="nodeValue">值包装</param>
/// <param name="i">顺序。</param>
/// <returns>返回是否过滤。</returns>
protected virtual bool PreFieldValue_Dictionary(System.Text.StringBuilder builder, string name, NoSQL.NodeValue nodeValue, ref int i)
{
if (nodeValue.Type == NoSQL.NodeValueTypes.Null)
{
return(false);
}
foreach (object item in (System.Collections.IEnumerable)nodeValue.Value)
{
string key = FastWrapper.Get(item, "Key") as string;
if (string.IsNullOrEmpty(key))
{
continue;
}
NoSQL.NodeValue value = new NoSQL.NodeValue(FastWrapper.Get(item, "Value"));
if (
string.Equals(key, "$add", System.StringComparison.OrdinalIgnoreCase) ||
string.Equals(key, "$+", System.StringComparison.OrdinalIgnoreCase))
{
i++;
if (i > 1)
{
builder.AppendLine(",");
}
var p = new CommandParameter()
{
Name = Dialect?.ParameterNameGrammar(name),
Value = value.Value,
RealType = value.Value?.GetType(),
};
_fields[name] = p;
builder.AppendFormat(" {0}={0}+{1}", _dialect.PreName(name), p.Name);
return(true);
}
else if (
string.Equals(key, "$minus", System.StringComparison.OrdinalIgnoreCase) ||
string.Equals(key, "$-", System.StringComparison.OrdinalIgnoreCase))
{
i++;
if (i > 1)
{
builder.AppendLine(",");
}
var p = new CommandParameter()
{
Name = Dialect?.ParameterNameGrammar(name),
Value = value.Value,
RealType = value.Value?.GetType(),
};
_fields[name] = p;
builder.AppendFormat(" {0}={0}-{1}", _dialect.PreName(name), p.Name);
return(true);
}
else if (
string.Equals(key, "$now", System.StringComparison.OrdinalIgnoreCase))
{
i++;
if (i > 1)
{
builder.AppendLine(",");
}
builder.Append(" ").Append(_dialect.PreName(name)).Append('=').Append(_dialect.DateTimeNowGrammar());
_fields.Remove(name);
return(true);
}
}
return(false);
}