error- IntegrityError at /register/

[Avnesh Shakya]

hi i have got error- IntegrityError at /register/

lrntkr_student.contact_no may not be NULL

,when i was trying to input data through html page(register.html), but data
is not updating in database and generating that error. please help me i m
unable to find this error.

thanks

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{%extends "homepage/index.html"%} {%block title%} Login {%endblock%} {%block content%} {% if not success %}

Registration

Name:

{% if name_error == "" %}

Name will contain first name and last name character.

{% else %}

{{ name_error }}

{% endif %}

Email id:

{% if emailid_error == "" %}

Example : u...@mail.com

{% else %}

{{ emailid_error }}

{% endif %}

User Name:

{% if username_error == "" %}

User name contain 6-8 letter combination of alphabet and digit no special character.

{% else %}

{{ username_error }}

{% endif %}

Password:

{% if password_error == "" %}

Password Must contain 8-15 Character.

{% else %}

{{ password_error }}

{% endif %}

Re-password:

{% if rpassword_error == "" %}

password is not matching

{% else %}

{{ rpassword_error }}

{% endif %}

Date Of Birth:

Month 1 2 3 4 5 6 7 8 9 10 11 12 Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Year 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967 1966 1965 1964 1963 1962 1961 1960 1959 1958 1957 1956 1955 1954 1953 1952 1951 1950 1949 1948 1947 1946 1945 1944 1943 1942 1941 1940 1939 1938 1937 1936 1935 1934 1933 1932 1931 1930 1929 1928 1927 1926 1925 1924 1923 1922 1921 1920 1919 1918 1917 1916 1915 1914 1913 1912 1911 1910 1909

Gender:

Male Female

Address:

{% if address_error == "" %}

need correct address

{% else %}

{{ address_error }}

{% endif %}

Contact no.:

{% if contact_error == "" %}

take only 11 digit

{% else %}

{{ contact_error }}

{% endif %}

{% else %}

Hi Thank you for your Registraton.

{% endif %} {%endblock%}

models.py
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views.py
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