在Pharo中FileDirectory和ReferenceStream类是否等效? [英] FileDirectory and ReferenceStream Class equivalents in Pharo?

问题描述

我正在执行持久性示例:

I'm doing the persistance example at:

http://book.seaside.st/book/advanced/persistency/image-based-persistency

它涉及创建一个使用FileDirectory类的方法，如下所示:

It involves creating a method that uses the FileDirectory class like this:

SMFileDatabase class>>backupDirectory
    ^ (FileDirectory default directoryNamed: self name) assureExistence.

Pharo似乎无法找到Class，并且搜索中出现的最接近的是FileDirectoryWrapper.这样可以吗?

Pharo seems to be unable to find the Class and the closest that comes out in search is FileDirectoryWrapper. Will this do?

NB.我自己无法弄清楚这一点，因为我以前从未使用过FileDirectory或FileDirectoryWrapper，所以我处于黑暗中.

NB. I can't figure this out myself since I've never used FileDirectory or FileDirectoryWrapper before so I'm in the dark.

以后的修改:

找到了另一个ReferenceStream.他们似乎都已被弃用. 在这里提到: http://lists.gforge.inria.fr/pipermail/pharo-project/2012-June/065765.html

Found another one ReferenceStream. They both seem to have been deprecated. Mentioned here: http://lists.gforge.inria.fr/pipermail/pharo-project/2012-June/065765.html

因为它们显然有问题，所以在这里提到: Smalltalk ReferenceStream在新的实例变量上有问题吗?

Because they apparently had problems, mentioned here: Smalltalk ReferenceStream has problems with new instance variables?

稍后

以下答案似乎适用于FileDirectory，在较新的Pharo发行版中，ReferenceStream可以由Fuel代替. https://stackoverflow.com/a/15742159/293856

It seems the answers below will work for FileDirectory, and ReferenceStream can be replaced by Fuel in newer Pharo releases. https://stackoverflow.com/a/15742159/293856

SmartRefStrem似乎是该bug的另一种解决方案.这一切都未经我检验. Smalltalk ReferenceStream在新的实例变量上有问题吗?

SmartRefStrem seems another solution to the bugs. All this is untested by me. Smalltalk ReferenceStream has problems with new instance variables?

但是:

那些想完成本书中示例的人需要回到过去，并从以下位置获得Pharo 1.4: https://gforge.inria.fr/frs/?group_id=1299

Those wanting to finish the example in the book need to go back in time and get a Pharo 1.4 from: https://gforge.inria.fr/frs/?group_id=1299

向下滚动并查找One-Click Pharo 1.4 ，并获得最新的版本(如果有比以下版本更新的版本): https://gforge.inria. fr/frs/download.php/file/31359/Pharo-1.4-14457-OneClick.zip

Scroll down and look for One-Click Pharo 1.4 and get the latest build, if there is a newer one than: https://gforge.inria.fr/frs/download.php/file/31359/Pharo-1.4-14457-OneClick.zip

或 1.3 .

我很幸运从这里获得了Pharo VM: http://files.pharo.org/vm/pharo/20/mac/stable.zip

I got lucky with a Pharo VM from here: http://files.pharo.org/vm/pharo/20/mac/stable.zip

在Pharo 1.3上运行的预构建Seaside图像在这里: http://www.seaside.st/distributions/Seaside-3.0. 7-final.zip

With a prebuilt Seaside image running on Pharo 1.3 here: http://www.seaside.st/distributions/Seaside-3.0.7-final.zip

通过Monticello从当前图像中获取代码，然后返回"到较早的图像中.成功！

Get your code out of the current image via Monticello and then "back" into the older image. Success!

推荐答案

最简单的方法如下:

self name asFileReference ensureCreateDirectory.

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