How to use for loop and if condition in a Html Template - Django

Here we are going to display a Student's Timetable using for loop and if condition in a Html Template in Django.

{% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %}
As shown above a single bracket and a percentage symbol is to be used for the declaration of both For-Loop and if condition in Django Html Template. Variable used in a For-Loop must always have to be an iterable one or it may end in non-iterable error. For example models.assign_time_table.objects.all().filter() or it has to be something like list. You can't iterate through a single object. As for If condition the variable has to be a non-iterable variable else it can't be used in If condition.

<td> {% for mon in mon_time_10 %} {% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td>
mon_time_10 time which means Monday@10 a single object which also can be looped because if it is filtered with objects.all().filter(). Suppose if the variable is filtered with objects.get() which will cause a non-iterable error.


Make sure you filter as much as you can in the views page not in the Html Template. Use Template For and If tags if required.

Code

<h3 id="head">Loged in as Student<span id="u_name"> Hello, {{request.user}}</span></h3> <div style="display: flex;"> <br><br> <form action="" method="post" id=""> {% csrf_token %} <h3 id="form_head">Classes assigned to</h3> <table border="5"> <thead> <tr> <th>Student Name</th> <th>Student Register Number</th> <th>Department</th> <th>Batch Start Year</th> <th>Batch End Year</th> </tr> </thead> <tr> <td>{{student.first_name}} {{student.last_name}}</td> <td>{{student.register_number}}</td> <td>{{student.degree}}</td> <td>{{student.course_start_year}}</td> <td>{{student.course_end_year}}</td> </tr> </table> </div> <h3 id="head">Assigned time table</h3> <br> <div style="display: flex;"> <table border="3"> <thead> <tr> <th>Day/Time</th> <th>10:00-10:50</th> <th>11:00-11:50</th> <th>12:00-13:00</th> <th>14:00-14:50</th> <th>15:00-15:50</th> <th>16:00-17:00</th> </tr> </thead> <tr> <th>Monday</th> <td> {% for mon in mon_time_10 %} {% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for mon in mon_time_11 %} {% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for mon in mon_time_12 %} {% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for mon in mon_time_14 %} {% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for mon in mon_time_15 %} {% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for mon in mon_time_16 %} {% for sub in subject %} {% if sub.identity_number == mon.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> </tr> <tr> <th>Tuesday</th> <td> {% for tue in tue_time_10 %} {% for sub in subject %} {% if sub.identity_number == tue.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for tue in tue_time_11 %} {% for sub in subject %} {% if sub.identity_number == tue.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for tue in tue_time_12 %} {% for sub in subject %} {% if sub.identity_number == tue.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for tue in tue_time_14 %} {% for sub in subject %} {% if sub.identity_number == tue.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for tue in tue_time_15 %} {% for sub in subject %} {% if sub.identity_number == tue.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for tue in tue_time_16 %} {% for sub in subject %} {% if sub.identity_number == tue.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> </tr> <tr> <th>Wednesday</th> <td> {% for wed in wed_time_10 %} {% for sub in subject %} {% if sub.identity_number == wed.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for wed in wed_time_11 %} {% for sub in subject %} {% if sub.identity_number == wed.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for wed in wed_time_12 %} {% for sub in subject %} {% if sub.identity_number == wed.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for wed in wed_time_14 %} {% for sub in subject %} {% if sub.identity_number == wed.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for wed in wed_time_15 %} {% for sub in subject %} {% if sub.identity_number == wed.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for wed in wed_time_16 %} {% for sub in subject %} {% if sub.identity_number == wed.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> </tr> <tr> <th>Thursday</th> <td> {% for thu in thu_time_10 %} {% for sub in subject %} {% if sub.identity_number == thu.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for thu in thu_time_11 %} {% for sub in subject %} {% if sub.identity_number == thu.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for thu in thu_time_16 %} {% for sub in subject %} {% if sub.identity_number == thu.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for thu in thu_time_16 %} {% for sub in subject %} {% if sub.identity_number == thu.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for thu in thu_time_16 %} {% for sub in subject %} {% if sub.identity_number == thu.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for thu in thu_time_16 %} {% for sub in subject %} {% if sub.identity_number == thu.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> </tr> <tr> <th>Friday</th> <td> {% for fri in fri_time_10 %} {% for sub in subject %} {% if sub.identity_number == fri.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for fri in fri_time_11 %} {% for sub in subject %} {% if sub.identity_number == fri.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for fri in fri_time_12 %} {% for sub in subject %} {% if sub.identity_number == fri.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for fri in fri_time_14 %} {% for sub in subject %} {% if sub.identity_number == fri.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for fri in fri_time_15 %} {% for sub in subject %} {% if sub.identity_number == fri.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for fri in fri_time_16 %} {% for sub in subject %} {% if sub.identity_number == fri.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> </tr> <tr> <th>Saturday</th> <td> {% for sat in sat_time_10 %} {% for sub in subject %} {% if sub.identity_number == sat.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sat in sat_time_11 %} {% for sub in subject %} {% if sub.identity_number == sat.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sat in sat_time_12 %} {% for sub in subject %} {% if sub.identity_number == sat.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sat in sat_time_14 %} {% for sub in subject %} {% if sub.identity_number == sat.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sat in sat_time_15 %} {% for sub in subject %} {% if sub.identity_number == sat.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sat in sat_time_16 %} {% for sub in subject %} {% if sub.identity_number == sat.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> </tr> <tr> <th>Sunday</th> <td> {% for sun in sun_time_10 %} {% for sub in subject %} {% if sub.identity_number == sun.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sun in sun_time_11 %} {% for sub in subject %} {% if sub.identity_number == sun.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sun in sun_time_12 %} {% for sub in subject %} {% if sub.identity_number == sun.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sun in sun_time_14 %} {% for sub in subject %} {% if sub.identity_number == sun.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sun in sun_time_15 %} {% for sub in subject %} {% if sub.identity_number == sun.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> <td> {% for sun in sun_time_16 %} {% for sub in subject %} {% if sub.identity_number == sun.identity_number %} {{sub.subject}} {% endif %} {% endfor %} {% endfor %} </td> </tr> </table> </div> {% endblock %}