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        Class&nbsp;IS_LENGTH
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<h1 class="epydoc">Class IS_LENGTH</h1><span class="codelink"><a href="web2py.gluon.validators-pysrc.html#IS_LENGTH">source&nbsp;code</a></span><br /><br />
<pre class="base-tree">
object --+    
         |    
 <a href="web2py.gluon.validators.Validator-class.html">Validator</a> --+
             |
            <strong class="uidshort">IS_LENGTH</strong>
</pre>

<hr />
<p>Checks if length of field's value fits between given boundaries. Works
  for both text and file inputs.</p>
  <p>Arguments:</p>
  <p>maxsize: maximum allowed length / size minsize: minimum allowed length
  / size</p>
  Examples:
<pre class="literalblock">
   #Check if text string is shorter than 33 characters:
   INPUT(_type='text', _name='name', requires=IS_LENGTH(32))

   #Check if password string is longer than 5 characters:
   INPUT(_type='password', _name='name', requires=IS_LENGTH(minsize=6))

   #Check if uploaded file has size between 1KB and 1MB:
   INPUT(_type='file', _name='name', requires=IS_LENGTH(1048576, 1024))

   &gt;&gt;&gt; IS_LENGTH()('')
   ('', None)
   &gt;&gt;&gt; IS_LENGTH()('1234567890')
   ('1234567890', None)
   &gt;&gt;&gt; IS_LENGTH(maxsize=5, minsize=0)('1234567890')  # too long
   ('1234567890', 'enter from 0 to 5 characters')
   &gt;&gt;&gt; IS_LENGTH(maxsize=50, minsize=20)('1234567890')  # too short
   ('1234567890', 'enter from 20 to 50 characters')
</pre><br /><br />

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