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<div class="document" id="fs-file">
<h1 class="title">Fs File</h1>
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<p><a class="reference external image-reference" href="https://odoo-community.org/page/development-status"><img alt="Alpha" src="https://img.shields.io/badge/maturity-Alpha-red.png" /></a> <a class="reference external image-reference" href="http://www.gnu.org/licenses/agpl-3.0-standalone.html"><img alt="License: AGPL-3" src="https://img.shields.io/badge/licence-AGPL--3-blue.png" /></a> <a class="reference external image-reference" href="https://github.com/OCA/storage/tree/16.0/fs_file"><img alt="OCA/storage" src="https://img.shields.io/badge/github-OCA%2Fstorage-lightgray.png?logo=github" /></a> <a class="reference external image-reference" href="https://translation.odoo-community.org/projects/storage-16-0/storage-16-0-fs_file"><img alt="Translate me on Weblate" src="https://img.shields.io/badge/weblate-Translate%20me-F47D42.png" /></a> <a class="reference external image-reference" href="https://runboat.odoo-community.org/builds?repo=OCA/storage&amp;target_branch=16.0"><img alt="Try me on Runboat" src="https://img.shields.io/badge/runboat-Try%20me-875A7B.png" /></a></p>
<p>This addon defines a new field type <cite>FSFile</cite> which is a file field that stores
a file in an external filesystem instead of the odoo’s filestore. This is useful for
large files that you don’t want to store in the filestore. Moreover, the field
value provides you an interface to access the file’s contents and metadata.</p>
<div class="admonition important">
<p class="first admonition-title">Important</p>
<p class="last">This is an alpha version, the data model and design can change at any time without warning.
Only for development or testing purpose, do not use in production.
<a class="reference external" href="https://odoo-community.org/page/development-status">More details on development status</a></p>
</div>
<p><strong>Table of contents</strong></p>
<div class="contents local topic" id="contents">
<ul class="simple">
<li><a class="reference internal" href="#usage" id="toc-entry-1">Usage</a></li>
<li><a class="reference internal" href="#changelog" id="toc-entry-2">Changelog</a><ul>
<li><a class="reference internal" href="#section-1" id="toc-entry-3">16.0.1.0.6 (2024-02-23)</a></li>
<li><a class="reference internal" href="#section-2" id="toc-entry-4">16.0.1.0.5 (2023-11-30)</a></li>
<li><a class="reference internal" href="#section-3" id="toc-entry-5">16.0.1.0.4 (2023-10-17)</a></li>
<li><a class="reference internal" href="#section-4" id="toc-entry-6">16.0.1.0.3 (2023-10-05)</a></li>
<li><a class="reference internal" href="#section-5" id="toc-entry-7">16.0.1.0.1 (2023-09-29)</a></li>
</ul>
</li>
<li><a class="reference internal" href="#bug-tracker" id="toc-entry-8">Bug Tracker</a></li>
<li><a class="reference internal" href="#credits" id="toc-entry-9">Credits</a><ul>
<li><a class="reference internal" href="#authors" id="toc-entry-10">Authors</a></li>
<li><a class="reference internal" href="#contributors" id="toc-entry-11">Contributors</a></li>
<li><a class="reference internal" href="#maintainers" id="toc-entry-12">Maintainers</a></li>
</ul>
</li>
</ul>
</div>
<div class="section" id="usage">
<h1><a class="toc-backref" href="#toc-entry-1">Usage</a></h1>
<p>The new field <strong>FSFile</strong> has been developed to allows you to store files
in an external filesystem storage. Its design is based on the following
principles:</p>
<ul class="simple">
<li>The content of the file must be read from the filesystem only when
needed.</li>
<li>It must be possible to manipulate the file content as a stream by default.</li>
<li>Unlike Odoo’s Binary field, the content is the raw file content by default
(no base64 encoding).</li>
<li>To allows to exchange the file content with other systems, writing the
content as base64 is possible. The read operation will return a json
structure with the filename, the mimetype, the size and a url to download the file.</li>
</ul>
<p>This design allows to minimize the memory consumption of the server when
manipulating large files and exchanging them with other systems through
the default jsonrpc interface.</p>
<p>Concretely, this design allows you to write code like this:</p>
<pre class="code python literal-block">
<span class="kn">from</span> <span class="nn">IO</span> <span class="kn">import</span> <span class="n">BytesIO</span><span class="w">
</span><span class="kn">from</span> <span class="nn">odoo</span> <span class="kn">import</span> <span class="n">models</span><span class="p">,</span> <span class="n">fields</span><span class="w">
</span><span class="kn">from</span> <span class="nn">odoo.addons.fs_file.fields</span> <span class="kn">import</span> <span class="n">FSFile</span><span class="w">
</span><span class="k">class</span> <span class="nc">MyModel</span><span class="p">(</span><span class="n">models</span><span class="o">.</span><span class="n">Model</span><span class="p">):</span><span class="w">
</span> <span class="n">_name</span> <span class="o">=</span> <span class="s1">'my.model'</span><span class="w">
</span> <span class="n">name</span> <span class="o">=</span> <span class="n">fields</span><span class="o">.</span><span class="n">Char</span><span class="p">()</span><span class="w">
</span> <span class="n">file</span> <span class="o">=</span> <span class="n">FSFile</span><span class="p">()</span><span class="w">
</span><span class="c1"># Create a new record with a raw content</span><span class="w">
</span><span class="n">my_model</span> <span class="o">=</span> <span class="n">MyModel</span><span class="o">.</span><span class="n">create</span><span class="p">({</span><span class="w">
</span> <span class="s1">'name'</span><span class="p">:</span> <span class="s1">'My File'</span><span class="p">,</span><span class="w">
</span> <span class="s1">'file'</span><span class="p">:</span> <span class="n">BytesIO</span><span class="p">(</span><span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">),</span><span class="w">
</span><span class="p">})</span><span class="w">
</span><span class="k">assert</span><span class="p">(</span><span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">)</span><span class="w">
</span><span class="c1"># Create a new record with a base64 encoded content</span><span class="w">
</span><span class="n">my_model</span> <span class="o">=</span> <span class="n">MyModel</span><span class="o">.</span><span class="n">create</span><span class="p">({</span><span class="w">
</span> <span class="s1">'name'</span><span class="p">:</span> <span class="s1">'My File'</span><span class="p">,</span><span class="w">
</span> <span class="s1">'file'</span><span class="p">:</span> <span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="o">.</span><span class="n">encode</span><span class="p">(</span><span class="s1">'base64'</span><span class="p">),</span><span class="w">
</span><span class="p">})</span><span class="w">
</span><span class="k">assert</span><span class="p">(</span><span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">)</span><span class="w">
</span><span class="c1"># Create a new record with a file content</span><span class="w">
</span><span class="n">my_model</span> <span class="o">=</span> <span class="n">MyModel</span><span class="o">.</span><span class="n">create</span><span class="p">({</span><span class="w">
</span> <span class="s1">'name'</span><span class="p">:</span> <span class="s1">'My File'</span><span class="p">,</span><span class="w">
</span> <span class="s1">'file'</span><span class="p">:</span> <span class="nb">open</span><span class="p">(</span><span class="s1">'my_file.txt'</span><span class="p">,</span> <span class="s1">'rb'</span><span class="p">),</span><span class="w">
</span><span class="p">})</span><span class="w">
</span><span class="k">assert</span><span class="p">(</span><span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">)</span><span class="w">
</span><span class="k">assert</span><span class="p">(</span><span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="s2">&quot;my_file.txt&quot;</span><span class="p">)</span><span class="w">
</span><span class="c1"># create a record with a file content as base64 encoded and a filename</span><span class="w">
</span><span class="c1"># This method is useful to create a record from a file uploaded</span><span class="w">
</span><span class="c1"># through the web interface.</span><span class="w">
</span><span class="n">my_model</span> <span class="o">=</span> <span class="n">MyModel</span><span class="o">.</span><span class="n">create</span><span class="p">({</span><span class="w">
</span> <span class="s1">'name'</span><span class="p">:</span> <span class="s1">'My File'</span><span class="p">,</span><span class="w">
</span> <span class="s1">'file'</span><span class="p">:</span> <span class="p">{</span><span class="w">
</span> <span class="s1">'filename'</span><span class="p">:</span> <span class="s1">'my_file.txt'</span><span class="p">,</span><span class="w">
</span> <span class="s1">'content'</span><span class="p">:</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">),</span><span class="w">
</span> <span class="p">},</span><span class="w">
</span><span class="p">})</span><span class="w">
</span><span class="k">assert</span><span class="p">(</span><span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">)</span><span class="w">
</span><span class="k">assert</span><span class="p">(</span><span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">name</span> <span class="o">==</span> <span class="s2">&quot;my_file.txt&quot;</span><span class="p">)</span><span class="w">
</span><span class="c1"># write the content of the file as base64 encoded and a filename</span><span class="w">
</span><span class="c1"># This method is useful to update a record from a file uploaded</span><span class="w">
</span><span class="c1"># through the web interface.</span><span class="w">
</span><span class="n">my_model</span><span class="o">.</span><span class="n">write</span><span class="p">({</span><span class="w">
</span> <span class="s1">'file'</span><span class="p">:</span> <span class="p">{</span><span class="w">
</span> <span class="s1">'name'</span><span class="p">:</span> <span class="s1">'my_file.txt'</span><span class="p">,</span><span class="w">
</span> <span class="s1">'file'</span><span class="p">:</span> <span class="n">base64</span><span class="o">.</span><span class="n">b64encode</span><span class="p">(</span><span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">),</span><span class="w">
</span> <span class="p">},</span><span class="w">
</span><span class="p">})</span><span class="w">
</span><span class="c1"># the call to read() will return a json structure with the filename,</span><span class="w">
</span><span class="c1"># the mimetype, the size and a url to download the file.</span><span class="w">
</span><span class="n">info</span> <span class="o">=</span> <span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">read</span><span class="p">()</span><span class="w">
</span><span class="k">assert</span><span class="p">(</span><span class="n">info</span><span class="p">[</span><span class="s2">&quot;file&quot;</span><span class="p">]</span> <span class="o">==</span> <span class="p">{</span><span class="w">
</span> <span class="s2">&quot;filename&quot;</span><span class="p">:</span> <span class="s2">&quot;my_file.txt&quot;</span><span class="p">,</span><span class="w">
</span> <span class="s2">&quot;mimetype&quot;</span><span class="p">:</span> <span class="s2">&quot;text/plain&quot;</span><span class="p">,</span><span class="w">
</span> <span class="s2">&quot;size&quot;</span><span class="p">:</span> <span class="mi">7</span><span class="p">,</span><span class="w">
</span> <span class="s2">&quot;url&quot;</span><span class="p">:</span> <span class="s2">&quot;/web/content/1234/my_file.txt&quot;</span><span class="p">,</span><span class="w">
</span><span class="p">})</span><span class="w">
</span><span class="c1"># use the field as a file stream</span><span class="w">
</span><span class="c1"># In such a case, the content is read from the filesystem without being</span><span class="w">
</span><span class="c1"># stored in memory.</span><span class="w">
</span><span class="k">with</span> <span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="s2">&quot;rb) as f:</span><span class="w">
</span> <span class="k">assert</span><span class="p">(</span><span class="n">f</span><span class="o">.</span><span class="n">read</span><span class="p">()</span> <span class="o">==</span> <span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">)</span><span class="w">
</span><span class="c1"># use the field as a file stream to write the content</span><span class="w">
</span><span class="c1"># In such a case, the content is written to the filesystem without being</span><span class="w">
</span><span class="c1"># stored in memory. This kind of approach is useful to manipulate large</span><span class="w">
</span><span class="c1"># files and to avoid to use too much memory.</span><span class="w">
</span><span class="c1"># Transactional behaviour is ensured by the implementation!</span><span class="w">
</span><span class="k">with</span> <span class="n">my_model</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">open</span><span class="p">(</span><span class="s2">&quot;wb&quot;</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span><span class="w">
</span> <span class="n">f</span><span class="o">.</span><span class="n">write</span><span class="p">(</span><span class="sa">b</span><span class="s2">&quot;content&quot;</span><span class="p">)</span>
</pre>
</div>
<div class="section" id="changelog">
<h1><a class="toc-backref" href="#toc-entry-2">Changelog</a></h1>
<div class="section" id="section-1">
<h2><a class="toc-backref" href="#toc-entry-3">16.0.1.0.6 (2024-02-23)</a></h2>
<p><strong>Bugfixes</strong></p>
<ul>
<li><p class="first">Fixes the creation of empty files.</p>
<p>Before this change, the creation of empty files resulted in a constraint
violation error. This was due to the fact that even if a name was given
to the file it was not preserved into the FSFileValue object if no content
was given. As result, when the corresponding ir.attachment was created in
the database, the name was not set and the ‘required’ constraint was violated. (<a class="reference external" href="https://github.com/OCA/storage/issues/341">#341</a>)</p>
</li>
</ul>
</div>
<div class="section" id="section-2">
<h2><a class="toc-backref" href="#toc-entry-4">16.0.1.0.5 (2023-11-30)</a></h2>
<p><strong>Bugfixes</strong></p>
<ul class="simple">
<li>Ensure the cache is properly set when a new value is assigned to a FSFile field.
If the field is stored the value to the cache must be a FSFileValue object
linked to the attachment record used to store the file. Otherwise the value
must be one given since it could be the result of a compute method. (<a class="reference external" href="https://github.com/OCA/storage/issues/290">#290</a>)</li>
</ul>
</div>
<div class="section" id="section-3">
<h2><a class="toc-backref" href="#toc-entry-5">16.0.1.0.4 (2023-10-17)</a></h2>
<p><strong>Bugfixes</strong></p>
<ul>
<li><p class="first">Browse attachment with sudo() to avoid read access errors</p>
<p>In models that have a multi fs image relation, a new line
in form will trigger onchanges and will call the fs.file model
‘convert_to_cache()’ method that will try to browse the attachment
with user profile that could have no read rights on attachment model. (<a class="reference external" href="https://github.com/OCA/storage/issues/288">#288</a>)</p>
</li>
</ul>
</div>
<div class="section" id="section-4">
<h2><a class="toc-backref" href="#toc-entry-6">16.0.1.0.3 (2023-10-05)</a></h2>
<p><strong>Bugfixes</strong></p>
<ul>
<li><p class="first">Fix the <em>mimetype</em> property on <em>FSFileValue</em> objects.</p>
<p>The <em>mimetype</em> value is computed as follow:</p>
<ul class="simple">
<li>If an attachment is set, the mimetype is taken from the attachment.</li>
<li>If no attachment is set, the mimetype is guessed from the name of the file.</li>
<li>If the mimetype cannot be guessed from the name, the mimetype is guessed from
the content of the file. (<a class="reference external" href="https://github.com/OCA/storage/issues/284">#284</a>)</li>
</ul>
</li>
</ul>
</div>
<div class="section" id="section-5">
<h2><a class="toc-backref" href="#toc-entry-7">16.0.1.0.1 (2023-09-29)</a></h2>
<p><strong>Features</strong></p>
<ul class="simple">
<li>Add a <em>url_path</em> property on the <em>FSFileValue</em> object. This property
allows you to easily get access to the relative path of the file on
the filesystem. This value is only available if the filesystem storage
is configured with a <em>Base URL</em> value. (<a class="reference external" href="https://github.com/OCA/storage/issues/281">#281</a>)</li>
</ul>
<p><strong>Bugfixes</strong></p>
<ul>
<li><p class="first">The <em>url_path</em>, <em>url</em> and <em>internal_url</em> properties on the <em>FSFileValue</em>
object return <em>None</em> if the information is not available (instead of <em>False</em>).</p>
<p>The <em>url</em> property on the <em>FSFileValue</em> object returns the filesystem url nor
the url field of the attachment. (<a class="reference external" href="https://github.com/OCA/storage/issues/281">#281</a>)</p>
</li>
</ul>
</div>
</div>
<div class="section" id="bug-tracker">
<h1><a class="toc-backref" href="#toc-entry-8">Bug Tracker</a></h1>
<p>Bugs are tracked on <a class="reference external" href="https://github.com/OCA/storage/issues">GitHub Issues</a>.
In case of trouble, please check there if your issue has already been reported.
If you spotted it first, help us to smash it by providing a detailed and welcomed
<a class="reference external" href="https://github.com/OCA/storage/issues/new?body=module:%20fs_file%0Aversion:%2016.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**">feedback</a>.</p>
<p>Do not contact contributors directly about support or help with technical issues.</p>
</div>
<div class="section" id="credits">
<h1><a class="toc-backref" href="#toc-entry-9">Credits</a></h1>
<div class="section" id="authors">
<h2><a class="toc-backref" href="#toc-entry-10">Authors</a></h2>
<ul class="simple">
<li>ACSONE SA/NV</li>
</ul>
</div>
<div class="section" id="contributors">
<h2><a class="toc-backref" href="#toc-entry-11">Contributors</a></h2>
<p>Laurent Mignon &lt;<a class="reference external" href="mailto:laurent.mignon&#64;acsone.eu">laurent.mignon&#64;acsone.eu</a>&gt;
Marie Lejeune &lt;<a class="reference external" href="mailto:marie.lejeune&#64;acsone.eu">marie.lejeune&#64;acsone.eu</a>&gt;
Hugues Damry &lt;<a class="reference external" href="mailto:hughes.damry&#64;acsone.eu">hughes.damry&#64;acsone.eu</a>&gt;</p>
</div>
<div class="section" id="maintainers">
<h2><a class="toc-backref" href="#toc-entry-12">Maintainers</a></h2>
<p>This module is maintained by the OCA.</p>
<a class="reference external image-reference" href="https://odoo-community.org"><img alt="Odoo Community Association" src="https://odoo-community.org/logo.png" /></a>
<p>OCA, or the Odoo Community Association, is a nonprofit organization whose
mission is to support the collaborative development of Odoo features and
promote its widespread use.</p>
<p>Current <a class="reference external" href="https://odoo-community.org/page/maintainer-role">maintainer</a>:</p>
<p><a class="reference external image-reference" href="https://github.com/lmignon"><img alt="lmignon" src="https://github.com/lmignon.png?size=40px" /></a></p>
<p>This module is part of the <a class="reference external" href="https://github.com/OCA/storage/tree/16.0/fs_file">OCA/storage</a> project on GitHub.</p>
<p>You are welcome to contribute. To learn how please visit <a class="reference external" href="https://odoo-community.org/page/Contribute">https://odoo-community.org/page/Contribute</a>.</p>
</div>
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