<p></p>
<blockquote>
<p dir="auto">I haven't researched how easy rails makes it to add your own attributes to the field helpers.</p>
</blockquote>
<p dir="auto">I've been looking into this today, and I haven't found any particularly neat way of doing this, other than monkey-patching the TextField initializer to add the option, e.g.</p>
<div class="highlight highlight-source-ruby"><pre><span class="pl-c"># Apply dir=auto to all text fields</span>
<span class="pl-c"># Also includes fields subclassed from TextField, like PasswordField, EmailField etc</span>
<span class="pl-k">module</span> <span class="pl-v">ActionView</span>
<span class="pl-k">module</span> <span class="pl-v">Helpers</span>
<span class="pl-k">module</span> <span class="pl-v">Tags</span>
<span class="pl-k">class</span> <span class="pl-v">TextField</span>
<span class="pl-k">def</span> <span class="pl-en">initialize</span><span class="pl-kos">(</span><span class="pl-s1">object_name</span><span class="pl-kos">,</span> <span class="pl-s1">method_name</span><span class="pl-kos">,</span> <span class="pl-s1">template_object</span><span class="pl-kos">,</span> <span class="pl-s1">options</span> <span class="pl-c1">=</span> <span class="pl-kos">{</span><span class="pl-kos">}</span><span class="pl-kos">)</span>
<span class="pl-smi">super</span><span class="pl-kos">(</span><span class="pl-s1">object_name</span><span class="pl-kos">,</span> <span class="pl-s1">method_name</span><span class="pl-kos">,</span> <span class="pl-s1">template_object</span><span class="pl-kos">,</span> <span class="pl-s1">options</span><span class="pl-kos">.</span><span class="pl-en">reverse_merge</span><span class="pl-kos">(</span><span class="pl-kos">{</span> <span class="pl-pds">:dir</span> <span class="pl-c1">=></span> <span class="pl-pds">:auto</span> <span class="pl-kos">}</span><span class="pl-kos">)</span><span class="pl-kos">)</span>
<span class="pl-k">end</span>
<span class="pl-k">end</span>
<span class="pl-k">end</span>
<span class="pl-k">end</span>
<span class="pl-k">end</span></pre></div>
<p dir="auto">Reading the source code for <a href="https://github.com/rails/rails/blob/7-0-stable/actionview/lib/action_view/helpers/tags/text_field.rb">TextField</a> and <a href="https://github.com/rails/rails/blob/7-0-stable/actionview/lib/action_view/helpers/tags/base.rb">Base</a> doesn't give me any hints that there are configurable defaults for the options hashes, only that they are expected to be passed in by the caller.</p>
<p dir="auto">I guess a non-monkey-patching approach would be to use our own FormBuilder that subclasses bootstrap_form's <a href="https://github.com/bootstrap-ruby/bootstrap_form/blob/main/lib/bootstrap_form/form_builder.rb">FormBuilder</a>, and add the default html attributes at that stage. I haven't explored that approach yet to see if there's any gotchas there.</p>
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