AttributeError Exception Value: 'IntegerField' object has no attribute 'max_length'

I did not put any max_length restrictions on the IntegerField hence I am not sure what is the issue. The code below is in models.py. Please tell me what else do i need to provide to give a better understanding to this issue.

Django version: Django==3.2

models.py

from django.db import models    class Rawdata(models.Model):  id = models.IntegerField(db_column='id', primary_key = True)  name = models.TextField(blank=True, null=True)  node = models.TextField(blank=True, null=True)  metal_stack = models.TextField(blank=True, null=True)  thickness = models.DecimalField(max_digits=4, decimal_places=2,blank=True, null=True)  mstk_id = models.IntegerField(db_column='MStk_id',blank=True, null=True)  # Field name made lowercase.  restrict = models.TextField(db_column='restrict', blank=True, null=True)  # Field name made lowercase.    class Meta:          db_table = 'rawdata'    class Technology(models.Model):  id = models.IntegerField(db_column='id', primary_key = True)  name = models.CharField(unique=True, max_length=45, blank=True, null=True)  node = models.CharField(max_length=45, blank=True, null=True)       def __str__(self):        return self.name       class Meta:              db_table = 'technology'        unique_together = (('name','node'),)    class Metalstack(models.Model):  id = models.IntegerField(db_column='id', primary_key = True)  techname = models.ForeignKey('Technology', to_field = 'name', on_delete = models.CASCADE, db_column ="techname",blank=True, null=True)  stackname = models.CharField(max_length=45, blank=True, null=True, db_column ="stackname")  mstk_id = models.IntegerField(blank=True, null=True, db_column ="mstk_id")  restrict = models.CharField(max_length=45, blank=True, null=True)      def __str__(self):        return self.stackname      class Meta:            db_table = 'metalstack'        unique_together = (('techname', 'stackname', 'mstk_id'),)    class Thickness(models.Model):  id = models.IntegerField(db_column='id', primary_key = True)  stack_id = models.ForeignKey(Metalstack, to_field = 'id', on_delete = models.CASCADE, db_column ="stack_id",blank=True, null=True )  thickness = models.DecimalField(max_digits=4, decimal_places=2,blank=True, null=True)      class Meta:             db_table = 'thickness'        unique_together = (('stack_id', 'thickness'),)  

admin.py This is the admin.py codes that i ran to sync the different tables in my database that have relationships schema. Everything works fine till i try to access the last table which is the thickness table.

from django.contrib import admin  from .models import Technology, Metalstack, Thickness, Rawdata  from django.apps import apps    class ThickAdmin (admin.ModelAdmin):  list_display = ('id','stack_id', 'thickness')  fields= ['id','stack_id','thickness']    search_fields = ['stack_id','thickness']  list_filter = [ 'thickness']  prepopulated_fields = {'id':('id',)}  ordering = ('id','stack_id')    class ModelInLine2(admin.TabularInline):  model =Thickness    class StackAdmin (admin.ModelAdmin):  model = Metalstack    list_display = ('id','techname','stackname', 'mstk_dm_id','mstk_restrict')  fields= ['id','techname','stackname', 'mstk_dm_id','mstk_restrict']    search_fields = ['stackname']  list_filter = ['techname','mstk_restrict']  prepopulated_fields = {'stackname':('stackname',)}  ordering = ('id','stackname')    inlines = [      ModelInLine2,  ]    class ModelInLine(admin.TabularInline):  model = Metalstack    class TechAdmin (admin.ModelAdmin):  model = Technology    list_display = ('name','node')    search_fields = ['name','node']  list_filter = ['name','node']  prepopulated_fields = {'name':('name',)}  ordering = ('id','name')    inlines = [      ModelInLine,  ]  

https://stackoverflow.com/questions/67327665/attributeerror-exception-value-integerfield-object-has-no-attribute-max-leng April 30, 2021 at 11:02AM