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<article class="md-content__inner md-typeset">
<h1>Champs de modèle</h1>
<div class="doc doc-object doc-module">
<div class="doc doc-contents first">
<div class="doc doc-children">
<div class="doc doc-object doc-class">
<h2 id="core.fields.ResizedImageFieldFile" class="doc doc-heading">
<code>ResizedImageFieldFile</code>
<a href="#core.fields.ResizedImageFieldFile" class="headerlink" title="Permanent link">¶</a></h2>
<div class="doc doc-contents ">
<p class="doc doc-class-bases">
Bases: <code><span title="django.db.models.fields.files.ImageFieldFile">ImageFieldFile</span></code></p>
<div class="doc doc-children">
<div class="doc doc-object doc-function">
<h3 id="core.fields.ResizedImageFieldFile.get_resized_dimensions" class="doc doc-heading">
<code class="highlight language-python"><span class="n">get_resized_dimensions</span><span class="p">(</span><span class="n">image</span><span class="p">)</span></code>
<a href="#core.fields.ResizedImageFieldFile.get_resized_dimensions" class="headerlink" title="Permanent link">¶</a></h3>
<div class="doc doc-contents ">
<p>Get the dimensions of the resized image.</p>
<p>If the width and height are given, they are used.
If only one is given, the other is calculated to keep the same ratio.</p>
<p><span class="doc-section-title">Returns:</span></p>
<table>
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr class="doc-section-item">
<td>
<code><span title="tuple">tuple</span>[<span title="int">int</span>, <span title="int">int</span>]</code>
</td>
<td>
<div class="doc-md-description">
<p>Tuple of width and height</p>
</div>
</td>
</tr>
</tbody>
</table>
<details class="quote">
<summary>Source code in <code>core/fields.py</code></summary>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-0-12">12</a></span>
<span class="normal"><a href="#__codelineno-0-13">13</a></span>
<span class="normal"><a href="#__codelineno-0-14">14</a></span>
<span class="normal"><a href="#__codelineno-0-15">15</a></span>
<span class="normal"><a href="#__codelineno-0-16">16</a></span>
<span class="normal"><a href="#__codelineno-0-17">17</a></span>
<span class="normal"><a href="#__codelineno-0-18">18</a></span>
<span class="normal"><a href="#__codelineno-0-19">19</a></span>
<span class="normal"><a href="#__codelineno-0-20">20</a></span>
<span class="normal"><a href="#__codelineno-0-21">21</a></span>
<span class="normal"><a href="#__codelineno-0-22">22</a></span>
<span class="normal"><a href="#__codelineno-0-23">23</a></span>
<span class="normal"><a href="#__codelineno-0-24">24</a></span>
<span class="normal"><a href="#__codelineno-0-25">25</a></span>
<span class="normal"><a href="#__codelineno-0-26">26</a></span>
<span class="normal"><a href="#__codelineno-0-27">27</a></span>
<span class="normal"><a href="#__codelineno-0-28">28</a></span>
<span class="normal"><a href="#__codelineno-0-29">29</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-0-12"><a id="__codelineno-0-12" name="__codelineno-0-12"></a><span class="k">def</span><span class="w"> </span><span class="nf">get_resized_dimensions</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">image</span><span class="p">:</span> <span class="n">Image</span><span class="o">.</span><span class="n">Image</span><span class="p">)</span> <span class="o">-></span> <span class="nb">tuple</span><span class="p">[</span><span class="nb">int</span><span class="p">,</span> <span class="nb">int</span><span class="p">]:</span>
</span><span id="__span-0-13"><a id="__codelineno-0-13" name="__codelineno-0-13"></a><span class="w"> </span><span class="sd">"""Get the dimensions of the resized image.</span>
</span><span id="__span-0-14"><a id="__codelineno-0-14" name="__codelineno-0-14"></a>
</span><span id="__span-0-15"><a id="__codelineno-0-15" name="__codelineno-0-15"></a><span class="sd"> If the width and height are given, they are used.</span>
</span><span id="__span-0-16"><a id="__codelineno-0-16" name="__codelineno-0-16"></a><span class="sd"> If only one is given, the other is calculated to keep the same ratio.</span>
</span><span id="__span-0-17"><a id="__codelineno-0-17" name="__codelineno-0-17"></a>
</span><span id="__span-0-18"><a id="__codelineno-0-18" name="__codelineno-0-18"></a><span class="sd"> Returns:</span>
</span><span id="__span-0-19"><a id="__codelineno-0-19" name="__codelineno-0-19"></a><span class="sd"> Tuple of width and height</span>
</span><span id="__span-0-20"><a id="__codelineno-0-20" name="__codelineno-0-20"></a><span class="sd"> """</span>
</span><span id="__span-0-21"><a id="__codelineno-0-21" name="__codelineno-0-21"></a> <span class="n">width</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="o">.</span><span class="n">width</span>
</span><span id="__span-0-22"><a id="__codelineno-0-22" name="__codelineno-0-22"></a> <span class="n">height</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="o">.</span><span class="n">height</span>
</span><span id="__span-0-23"><a id="__codelineno-0-23" name="__codelineno-0-23"></a> <span class="k">if</span> <span class="n">width</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">height</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-24"><a id="__codelineno-0-24" name="__codelineno-0-24"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="o">.</span><span class="n">width</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="o">.</span><span class="n">height</span>
</span><span id="__span-0-25"><a id="__codelineno-0-25" name="__codelineno-0-25"></a> <span class="k">if</span> <span class="n">width</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-26"><a id="__codelineno-0-26" name="__codelineno-0-26"></a> <span class="n">width</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">image</span><span class="o">.</span><span class="n">width</span> <span class="o">*</span> <span class="n">height</span> <span class="o">/</span> <span class="n">image</span><span class="o">.</span><span class="n">height</span><span class="p">)</span>
</span><span id="__span-0-27"><a id="__codelineno-0-27" name="__codelineno-0-27"></a> <span class="k">elif</span> <span class="n">height</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-28"><a id="__codelineno-0-28" name="__codelineno-0-28"></a> <span class="n">height</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">image</span><span class="o">.</span><span class="n">height</span> <span class="o">*</span> <span class="n">width</span> <span class="o">/</span> <span class="n">image</span><span class="o">.</span><span class="n">width</span><span class="p">)</span>
</span><span id="__span-0-29"><a id="__codelineno-0-29" name="__codelineno-0-29"></a> <span class="k">return</span> <span class="n">width</span><span class="p">,</span> <span class="n">height</span>
</span></code></pre></div></td></tr></table></div>
</details>
</div>
</div>
<div class="doc doc-object doc-function">
<h3 id="core.fields.ResizedImageFieldFile.get_name" class="doc doc-heading">
<code class="highlight language-python"><span class="n">get_name</span><span class="p">()</span></code>
<a href="#core.fields.ResizedImageFieldFile.get_name" class="headerlink" title="Permanent link">¶</a></h3>
<div class="doc doc-contents ">
<p>Get the name of the resized image.</p>
<p>If the field has a force_format attribute,
the extension of the file will be changed to match it.
Otherwise, the name is left unchanged.</p>
<p><span class="doc-section-title">Raises:</span></p>
<table>
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr class="doc-section-item">
<td>
<code><span title="ValueError">ValueError</span></code>
</td>
<td>
<div class="doc-md-description">
<p>If the image format is unknown</p>
</div>
</td>
</tr>
</tbody>
</table>
<details class="quote">
<summary>Source code in <code>core/fields.py</code></summary>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-0-31">31</a></span>
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<span class="normal"><a href="#__codelineno-0-45">45</a></span>
<span class="normal"><a href="#__codelineno-0-46">46</a></span>
<span class="normal"><a href="#__codelineno-0-47">47</a></span>
<span class="normal"><a href="#__codelineno-0-48">48</a></span>
<span class="normal"><a href="#__codelineno-0-49">49</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-0-31"><a id="__codelineno-0-31" name="__codelineno-0-31"></a><span class="k">def</span><span class="w"> </span><span class="nf">get_name</span><span class="p">(</span><span class="bp">self</span><span class="p">)</span> <span class="o">-></span> <span class="nb">str</span><span class="p">:</span>
</span><span id="__span-0-32"><a id="__codelineno-0-32" name="__codelineno-0-32"></a><span class="w"> </span><span class="sd">"""Get the name of the resized image.</span>
</span><span id="__span-0-33"><a id="__codelineno-0-33" name="__codelineno-0-33"></a>
</span><span id="__span-0-34"><a id="__codelineno-0-34" name="__codelineno-0-34"></a><span class="sd"> If the field has a force_format attribute,</span>
</span><span id="__span-0-35"><a id="__codelineno-0-35" name="__codelineno-0-35"></a><span class="sd"> the extension of the file will be changed to match it.</span>
</span><span id="__span-0-36"><a id="__codelineno-0-36" name="__codelineno-0-36"></a><span class="sd"> Otherwise, the name is left unchanged.</span>
</span><span id="__span-0-37"><a id="__codelineno-0-37" name="__codelineno-0-37"></a>
</span><span id="__span-0-38"><a id="__codelineno-0-38" name="__codelineno-0-38"></a><span class="sd"> Raises:</span>
</span><span id="__span-0-39"><a id="__codelineno-0-39" name="__codelineno-0-39"></a><span class="sd"> ValueError: If the image format is unknown</span>
</span><span id="__span-0-40"><a id="__codelineno-0-40" name="__codelineno-0-40"></a><span class="sd"> """</span>
</span><span id="__span-0-41"><a id="__codelineno-0-41" name="__codelineno-0-41"></a> <span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="o">.</span><span class="n">force_format</span><span class="p">:</span>
</span><span id="__span-0-42"><a id="__codelineno-0-42" name="__codelineno-0-42"></a> <span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">name</span>
</span><span id="__span-0-43"><a id="__codelineno-0-43" name="__codelineno-0-43"></a> <span class="n">formats</span> <span class="o">=</span> <span class="p">{</span><span class="n">val</span><span class="p">:</span> <span class="n">key</span> <span class="k">for</span> <span class="n">key</span><span class="p">,</span> <span class="n">val</span> <span class="ow">in</span> <span class="n">Image</span><span class="o">.</span><span class="n">registered_extensions</span><span class="p">()</span><span class="o">.</span><span class="n">items</span><span class="p">()}</span>
</span><span id="__span-0-44"><a id="__codelineno-0-44" name="__codelineno-0-44"></a> <span class="n">new_format</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">field</span><span class="o">.</span><span class="n">force_format</span>
</span><span id="__span-0-45"><a id="__codelineno-0-45" name="__codelineno-0-45"></a> <span class="k">if</span> <span class="n">new_format</span> <span class="ow">in</span> <span class="n">formats</span><span class="p">:</span>
</span><span id="__span-0-46"><a id="__codelineno-0-46" name="__codelineno-0-46"></a> <span class="n">extension</span> <span class="o">=</span> <span class="n">formats</span><span class="p">[</span><span class="n">new_format</span><span class="p">]</span>
</span><span id="__span-0-47"><a id="__codelineno-0-47" name="__codelineno-0-47"></a> <span class="k">else</span><span class="p">:</span>
</span><span id="__span-0-48"><a id="__codelineno-0-48" name="__codelineno-0-48"></a> <span class="k">raise</span> <span class="ne">ValueError</span><span class="p">(</span><span class="sa">f</span><span class="s2">"Unknown format </span><span class="si">{</span><span class="n">new_format</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
</span><span id="__span-0-49"><a id="__codelineno-0-49" name="__codelineno-0-49"></a> <span class="k">return</span> <span class="nb">str</span><span class="p">(</span><span class="n">Path</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">file</span><span class="o">.</span><span class="n">name</span><span class="p">)</span><span class="o">.</span><span class="n">with_suffix</span><span class="p">(</span><span class="n">extension</span><span class="p">))</span>
</span></code></pre></div></td></tr></table></div>
</details>
</div>
</div>
</div>
</div>
</div>
<div class="doc doc-object doc-class">
<h2 id="core.fields.ResizedImageField" class="doc doc-heading">
<code class="highlight language-python"><span class="n">ResizedImageField</span><span class="p">(</span><span class="n">width</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">height</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="n">force_format</span><span class="o">=</span><span class="kc">None</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span></code>
<a href="#core.fields.ResizedImageField" class="headerlink" title="Permanent link">¶</a></h2>
<div class="doc doc-contents ">
<p class="doc doc-class-bases">
Bases: <code><span title="django.db.models.ImageField">ImageField</span></code></p>
<p>A field that automatically resizes images to a given size.</p>
<p>This field is useful for profile pictures or product icons, for example.</p>
<p>The final size of the image is determined by the width and height parameters :</p>
<ul>
<li>If both are given, the image will be resized
to fit in a rectangle of width x height</li>
<li>If only one is given, the other will be calculated to keep the same ratio</li>
</ul>
<p>If the force_format parameter is given, the image will be converted to this format.</p>
<p><span class="doc-section-title">Examples:</span></p>
<p>To resize an image with a height of 100px, without changing the ratio,
and a format of WEBP :</p>
<div class="language-python highlight"><pre><span></span><code><span id="__span-0-1"><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="k">class</span><span class="w"> </span><span class="nc">Product</span><span class="p">(</span><span class="n">models</span><span class="o">.</span><span class="n">Model</span><span class="p">):</span>
</span><span id="__span-0-2"><a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a> <span class="n">icon</span> <span class="o">=</span> <span class="n">ResizedImageField</span><span class="p">(</span><span class="n">height</span><span class="o">=</span><span class="mi">100</span><span class="p">,</span> <span class="n">force_format</span><span class="o">=</span><span class="s2">"WEBP"</span><span class="p">)</span>
</span></code></pre></div>
<p>To explicitly resize an image to 100x100px (but possibly change the ratio) :</p>
<div class="language-python highlight"><pre><span></span><code><span id="__span-1-1"><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="k">class</span><span class="w"> </span><span class="nc">Product</span><span class="p">(</span><span class="n">models</span><span class="o">.</span><span class="n">Model</span><span class="p">):</span>
</span><span id="__span-1-2"><a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a> <span class="n">icon</span> <span class="o">=</span> <span class="n">ResizedImageField</span><span class="p">(</span><span class="n">width</span><span class="o">=</span><span class="mi">100</span><span class="p">,</span> <span class="n">height</span><span class="o">=</span><span class="mi">100</span><span class="p">)</span>
</span></code></pre></div>
<p><span class="doc-section-title">Raises:</span></p>
<table>
<thead>
<tr>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr class="doc-section-item">
<td>
<code><span title="django.core.exceptions.FieldError">FieldError</span></code>
</td>
<td>
<div class="doc-md-description">
<p>If neither width nor height is given</p>
</div>
</td>
</tr>
</tbody>
</table>
<p><span class="doc-section-title">Parameters:</span></p>
<table>
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th>Description</th>
<th>Default</th>
</tr>
</thead>
<tbody>
<tr class="doc-section-item">
<td>
<code>width</code>
</td>
<td>
<code><span title="int">int</span> | None</code>
</td>
<td>
<div class="doc-md-description">
<p>If given, the width of the resized image</p>
</div>
</td>
<td>
<code>None</code>
</td>
</tr>
<tr class="doc-section-item">
<td>
<code>height</code>
</td>
<td>
<code><span title="int">int</span> | None</code>
</td>
<td>
<div class="doc-md-description">
<p>If given, the height of the resized image</p>
</div>
</td>
<td>
<code>None</code>
</td>
</tr>
<tr class="doc-section-item">
<td>
<code>force_format</code>
</td>
<td>
<code><span title="str">str</span> | None</code>
</td>
<td>
<div class="doc-md-description">
<p>If given, the image will be converted to this format</p>
</div>
</td>
<td>
<code>None</code>
</td>
</tr>
</tbody>
</table>
<details class="quote">
<summary>Source code in <code>core/fields.py</code></summary>
<div class="language-python highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"><a href="#__codelineno-0-101">101</a></span>
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<span class="normal"><a href="#__codelineno-0-116">116</a></span></pre></div></td><td class="code"><div><pre><span></span><code><span id="__span-0-101"><a id="__codelineno-0-101" name="__codelineno-0-101"></a><span class="k">def</span><span class="w"> </span><span class="fm">__init__</span><span class="p">(</span>
</span><span id="__span-0-102"><a id="__codelineno-0-102" name="__codelineno-0-102"></a> <span class="bp">self</span><span class="p">,</span>
</span><span id="__span-0-103"><a id="__codelineno-0-103" name="__codelineno-0-103"></a> <span class="n">width</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-104"><a id="__codelineno-0-104" name="__codelineno-0-104"></a> <span class="n">height</span><span class="p">:</span> <span class="nb">int</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-105"><a id="__codelineno-0-105" name="__codelineno-0-105"></a> <span class="n">force_format</span><span class="p">:</span> <span class="nb">str</span> <span class="o">|</span> <span class="kc">None</span> <span class="o">=</span> <span class="kc">None</span><span class="p">,</span>
</span><span id="__span-0-106"><a id="__codelineno-0-106" name="__codelineno-0-106"></a> <span class="o">**</span><span class="n">kwargs</span><span class="p">,</span>
</span><span id="__span-0-107"><a id="__codelineno-0-107" name="__codelineno-0-107"></a><span class="p">):</span>
</span><span id="__span-0-108"><a id="__codelineno-0-108" name="__codelineno-0-108"></a> <span class="k">if</span> <span class="n">width</span> <span class="ow">is</span> <span class="kc">None</span> <span class="ow">and</span> <span class="n">height</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
</span><span id="__span-0-109"><a id="__codelineno-0-109" name="__codelineno-0-109"></a> <span class="k">raise</span> <span class="n">FieldError</span><span class="p">(</span>
</span><span id="__span-0-110"><a id="__codelineno-0-110" name="__codelineno-0-110"></a> <span class="sa">f</span><span class="s2">"</span><span class="si">{</span><span class="bp">self</span><span class="o">.</span><span class="vm">__class__</span><span class="o">.</span><span class="vm">__name__</span><span class="si">}</span><span class="s2"> requires "</span>
</span><span id="__span-0-111"><a id="__codelineno-0-111" name="__codelineno-0-111"></a> <span class="s2">"width, height or both, but got neither"</span>
</span><span id="__span-0-112"><a id="__codelineno-0-112" name="__codelineno-0-112"></a> <span class="p">)</span>
</span><span id="__span-0-113"><a id="__codelineno-0-113" name="__codelineno-0-113"></a> <span class="bp">self</span><span class="o">.</span><span class="n">width</span> <span class="o">=</span> <span class="n">width</span>
</span><span id="__span-0-114"><a id="__codelineno-0-114" name="__codelineno-0-114"></a> <span class="bp">self</span><span class="o">.</span><span class="n">height</span> <span class="o">=</span> <span class="n">height</span>
</span><span id="__span-0-115"><a id="__codelineno-0-115" name="__codelineno-0-115"></a> <span class="bp">self</span><span class="o">.</span><span class="n">force_format</span> <span class="o">=</span> <span class="n">force_format</span>
</span><span id="__span-0-116"><a id="__codelineno-0-116" name="__codelineno-0-116"></a> <span class="nb">super</span><span class="p">()</span><span class="o">.</span><span class="fm">__init__</span><span class="p">(</span><span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
</span></code></pre></div></td></tr></table></div>
</details>
<div class="doc doc-children">
</div>
</div>
</div>
</div>
</div>
</div>
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