muk_base/muk_fields_lobject/static/description/index.html

<section class="oe_container">
	<div class="oe_row oe_spaced">
		<h2 class="oe_slogan">MuK PGSQL Large Objects</h2>
		<h3 class="oe_slogan">PGSQL Large Objects Support</h3>
		<h4 class="oe_slogan" style="font-size: 23px;">MuK IT GmbH -
			www.mukit.at</h4>
	</div>
</section>

<section class="oe_container">
	<div class="oe_row oe_spaced">
		<div class="oe_picture">
			<h3 class="oe_slogan">Overview</h3>
			<div class="oe_mt32"
				style="padding-bottom: 10px; text-align: justify;">
				<p>Provides a field to store bytes as PostgreSQL large objects.
					PostgreSQL offers support for large objects, which provide
					stream-style access to user data that is stored in a special
					large-object structure. They are useful with data values too large
					to be manipulated conveniently as a whole.</p>
				<h5 style="padding-top: 10px;">Psycopg2 for Python</h5>
				<p>
					Psycopg allows access to the large object using the
					<code>lobject</code>
					class. Objects are generated using the
					<code>connection.lobject()</code>
					factory method. Data can be retrieved either as bytes or as Unicode
					strings.
				</p>
				<p>
					Psycopg large object support efficient import/export with file
					system files using the
					<code>lo_import()</code>
					and
					<code>lo_export()</code>
					libpq functions.
				</p>
				<p>Changed in version 2.6: added support for large objects
					greated than 2GB. Note that the support is enabled only if all the
					following conditions are verified:</p>
				<ul>
					<li>the Python build is 64 bits;</li>
					<li>the extension was built against at least libpq 9.3;</li>
					<li>the server version is at least PostgreSQL 9.3
						(server_version must be >= 90300).</li>
				</ul>
				<p>
					If Psycopg was built with 64 bits large objects support (i.e. the
					first two contidions above are verified), the
					<code>psycopg2.__version__</code>
					constant will contain the lo64 flag. If any of the contition is not
					met several lobject methods will fail if the arguments exceed 2GB.
				</p>
			</div>

			<pre>
		    	<code>
from odoo.addons.muk_fields_lobject import fields as lobject_fields

class LargeObjectModel(models.Model):

    data_content = lobject_fields.LargeObject(string="Data")

    @api.multi
    def data(self):
        for record in self:
            bytes = record.data_content
            oid = record.with_context({'oid': True}).data_content
            size = record.with_context({'bin_size': True}).data_content
            stream = record.with_context({'stream': True}).data_content
		    	</code>
			</pre>
		</div>
	</div>
</section>

<section class="oe_container oe_dark" style="margin-top: 450px;">
	<h3 class="oe_slogan">Help and Support</h3>
	<div class="oe_slogan">
		<a class="btn btn-primary btn-lg mt8" href="mailto:sale@mukit.at">
			<i class="fa fa-envelope"></i> Email
		</a> <a class="btn btn-primary btn-lg mt8"
			href="https://mukit.at/page/contactus"> <i class="fa fa-phone"></i>
			Contact
		</a>
	</div>
	<img src="logo.png" style="width: 200px; margin-bottom: 20px;"
		class="center-block">
</section>