357 lines
14 KiB
HTML
357 lines
14 KiB
HTML
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<title>Data Modelling | Documentation | Lektor Static Content Management System</title>
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<li><a href="../">Welcome</a></li>
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<li><a href="../what/">What is Lektor</a>
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<li><a href="../installation/">Installation</a>
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<li><a href="../plugins/">Plugins</a>
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<li class="active"><a href="./">Data Modelling</a>
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<ul>
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<li><a href="attachments/">Attachments</a>
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<li><a href="children/">Children & Pagination</a>
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<li><a href="selection/">Default Model Selection</a>
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<li><a href="flow/">Flow Block Models</a>
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<div class="visible-md-block visible-lg-block">
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<h4>This Page</h4>
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<ul class="toc">
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<li><a href="#models">Models</a></li>
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<li><a href="#fields">Fields</a></li>
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<li><a href="#model-options">Model Options</a></li>
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</ul>
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</div>
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</div>
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<div class="col-sm-9 doc-styling">
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<h1>Data Modelling</h1>
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<ul class=page-meta>
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</ul>
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<p>What makes Lektor so powerful is the ability to model your data and to then use
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this data to generate the final results. Getting this part right will make it
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easier later to generate beautiful looking HTML.</p>
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<h2 id="models">Models</h2><p>Models are the blueprints for your pages. They define which fields exist and
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what goes into them. Models are stored in the <code>models</code> folder in your project
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and are basic UTF-8 encoded INI files. Models can have any name but if no
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model has been explicitly selected, a default model will be selected. For
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most situations this will be the model with the name <code>page</code>. Detailed
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information can be found under <a href="selection/" class="ref">Default Model Selection</a>.</p>
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<p>Here is an example of a very basic model (<code>models/page.ini</code>):</p>
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<div class="hll"><pre><span></span><span class="k">[model]</span>
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<span class="na">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">Page</span>
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<span class="na">label</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">{{ this.title }}</span>
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<span class="k">[fields.title]</span>
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<span class="na">label</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">Title</span>
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<span class="na">type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">string</span>
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<span class="na">size</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">large</span>
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<span class="k">[fields.body]</span>
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<span class="na">label</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">Body</span>
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<span class="na">type</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="s">markdown</span>
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</pre></div>
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<p>In this particular case, we have a model with the id <code>page</code> (as defined by the
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filename) and a name <code>Page</code> which will appear like that in the UI. Pages that
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use this model will use the template expression <code>{{ this.title }}</code> to be
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displayed in the UI. In this case, it uses the title of the page.</p>
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<p>There are two fields defined: a <code>title</code> and a <code>body</code>. The former is just an
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unformatted string which is shown larger in the UI (<code>size = large</code>) and the
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latter uses markdown for rendering. This will give it a text area in the admin
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panel.</p>
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<h2 id="fields">Fields</h2><p>Fields for models are ordered in the UI in the order they appear in the model.
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Most options in the field are specific to the type that is selected, but some
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are the same for all of them.</p>
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<p>Fields not only define the behavior of the data (for instance strings and
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integers are sorted differently) but also how it's shown in the UI and what
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can be done with it in general.</p>
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<p>The following options are used for all types:</p>
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<ul>
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<li><code>label</code>: the label for the field. This is shown in the UI in larger letters</li>
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<li><code>description</code>: an optional string that provides some description for the
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field that is shown in the UI to give a bit more explanation.</li>
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<li><code>addon_label</code>: an optional string that is supported by all types that are
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rendered as an input field. This string is shown as an UI label on the
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right side of the input field to give it more context. For instance, it can
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be used to clarify units of a field (pixel, percent etc.).</li>
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<li><code>width</code>: defines the width of the input in the admin as a fraction. For
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instance <code>1/4</code> sets it to a quarter of the width, <code>1/2</code> to a half etc.</li>
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<li><code>size</code> can be set to <code>normal</code>, <code>small</code> or <code>large</code> to affect the size a
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field is rendered in the admin UI.</li>
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<li><code>type</code>: defines the type of the field. Depending on the type more options
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can become available.</li>
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</ul>
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<p>There are many different field types that are available and they are documented
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extensively in the <a href="../api/db/types/" class="ref">types documentation</a>.</p>
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<h2 id="model-options">Model Options</h2><p>Models have the following options that can customize the model itself:</p>
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<ul>
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<li><code>name</code>: the name of the model itself. Usually a more capitalized form of
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the filename which is the ID of the model.</li>
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<li><code>label</code>: a template expression that should be used for pages that use this
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model. Typically this expression refers to the title but not always. For
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instance blog posts might also want to refer to the date.</li>
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<li><code>hidden</code>: a boolean value that indicates if the model should be hidden from
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the UI or not. If set to <code>yes</code> then new pages cannot select this model.
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This is very useful for models that are implied through configuration.</li>
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<li><code>protected</code>: if a model is set to protected then all of its instances
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cannot be deleted once created.</li>
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<li><code>inherits</code>: if you want to inherit all fields and model option settings from another model then this
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can be set to the name of another model.</li>
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</ul>
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<p>In addition to that, there are some configuration sections in the model file
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that can customize more behavior.</p>
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<div class="child-pages nocontent">
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<div class="row">
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<div class="col-md-6 child">
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<h4>
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<i class="glyphicon glyphicon-list-alt"></i>
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<a href="attachments/">Attachments</a>
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</h4>
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<p class="summary">Describes behavior of attachments for records.</p>
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</div>
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<div class="col-md-6 child">
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<h4>
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<i class="glyphicon glyphicon-list-alt"></i>
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<a href="children/">Children & Pagination</a>
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</h4>
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<p class="summary">Explains how child records and pagination works.</p>
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</div>
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</div>
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<div class="row">
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<div class="col-md-6 child">
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<h4>
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<i class="glyphicon glyphicon-list-alt"></i>
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<a href="selection/">Default Model Selection</a>
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</h4>
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<p class="summary">Explains how Lektor decides on the model to use.</p>
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</div>
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<div class="col-md-6 child">
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<h4>
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<i class="glyphicon glyphicon-list-alt"></i>
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<a href="flow/">Flow Block Models</a>
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</h4>
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<p class="summary">Explains how to model flow blocks.</p>
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</div>
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