Django how to use post_save signals -

i had learn django signals but, don't known implement in project , how use in project. in project want send email alerts if matches particular criteria. in case need use post_save signals.i added code this. kindly share ideas.

models.py

class personal(models.model):     user = models.onetoonefield(user)     email = models.emailfield(max_length=100, blank=true, null=true)     country = models.charfield(max_length=100, blank=true, null=true)     state = models.charfield(max_length=100, blank=true, null=true)     city = models.charfield(max_length=100, blank=true, null=true)  class skills(models.model):     user = models.foreignkey(user)     skill = models.charfield(max_length=100, blank=true, null=true)  class jobs(models.model):     emp = models.foreignkey(user, unique=false)     title = models.charfield(max_length=100)     industry = models.charfield(max_length=100)     functionalarea = models.charfield(max_length=100)     min_exp = models.integerfield(default=0)     max_exp = models.integerfield(default=0)     city = models.charfield(max_length=100)     state = models.charfield(max_length=100)     country = models.charfield(max_length=100)     empskills = models.charfield(max_length=100, blank=true, null=true) 

here want match city , empskills of jobs table personal.city , skills.skill model. event occurs every job posting if matches 1 field send mail personal.email automatically. please give sample 1 , how use signal.

write function outside model handles when new job posted , finds people email.

you specify job sender post_save signal , connect function.

from django.db.models.signals import post_save django.dispatch import receiver  @receiver(post_save, sender=job) def handle_new_job(sender, **kwargs):     job = kwargs.get('instance')     logger.info("post_save : job : %s" % job)     # find people email based on `job` instance