I've spent many hours trying to get my bibliography working - unsuccessfully. I suspect that, somehow, my .bib file doesn't get recognised.
Help would be greatly appreciated.
MWE:
\documentclass[a4paper, 12pt]{article}
\usepackage{array}
\usepackage{lscape}
\usepackage[paper=portrait,pagesize]{typearea}
\usepackage[showframe=false]{geometry}
\usepackage{changepage}
\usepackage{tabularx}
\usepackage{graphicx}
\usepackage{adjustbox}
\usepackage[utf8]{inputenc}
\usepackage{babel,csquotes,xpatch}
\usepackage[backend=biber,style=authoryear, natbib]{biblatex}
\addbibresource{test.bib}
\usepackage{xurl}
\usepackage[colorlinks,allcolors=blue]{hyperref}
\begin{document}
This is a test... test test\\
\cite{glaeser_gyourko}\\
\cite{hsieh-moretti:2019}\\
\cite{glaeser_gyourko}\\
\printbibliography
\end{document}
test.bib file:
#article{hsieh-moretti:2019,
Author = {Hsieh, Chang-Tai and Moretti, Enrico},
Title = {Housing Constraints and Spatial Misallocation},
Journal = {American Economic Journal: Macroeconomics},
Volume = {11},
Number = {2},
Year = {2019},
Month = {4},
Pages = {1-39},
DOI = {10.1257/mac.20170388},
URL = {https://www.aeaweb.org/articles?id=10.1257/mac.20170388}
}
#article{glaeser_gyourko,
Author = {Glaeser, Edward and Gyourko, Joseph},
Title = {The Economic Implications of Housing Supply},
Journal = {Journal of Economic Perspectives},
Volume = {32},
Number = {1},
Year = {2018},
Month = {2},
Pages = {3-30},
DOI = {10.1257/jep.32.1.3},
URL = {https://www.aeaweb.org/articles?id=10.1257/jep.32.1.3}
}
In PDF it looks like this: enter image description here
I get the following information in the source viewer:
Process started
INFO - This is Biber 2.14 INFO - Logfile is 'test.blg' INFO - Reading
'test.bcf' INFO - Found 2 citekeys in bib section 0 INFO - Processing
section 0 INFO - Globbing data source 'test.bib' INFO - Globbed data
source 'test.bib' to test.bib INFO - Looking for bibtex format file
'test.bib' for section 0 INFO - LaTeX decoding ... INFO - Found
BibTeX data source 'test.bib'
Process exited with error(s)
I use texmaker 5.0.4 on MacOS and I post my configurations here:
enter image description here enter image description here
I really have very little idea on what goes on. Today, I started a work session, added a new source and it didn't work. I deleted the new source so that the bibliography would be the same as prior to me changing it, and it didn't work either. So, this let's me assume that, somehow, the program doesn't understand where the bibliography is. The .bib file and the document are in the same folder.
What I tried:
Triple checked code in bibliography using tools such as https://biblatex-linter.herokuapp.com/
Clear the cache of all documents.
change the natbib in the command \usepackage[backend=biber,style=authoryear, natbib]{biblatex} to biber -> doesn't seem to work.
Left out natbib and got same result. \usepackage[backend=biber,style=authoryear, natbib]{biblatex} => \usepackage[backend=biber,style=authoryear]{biblatex}
Add the command \usepackgage{natbitb} in addition to biblatex but this produces compatibility issues.
Add the codes \usepackage[utf8]{inputenc} &
\usepackage{babel,csquotes,xpatch} because they are recommendet by this biblatex cheat sheet: http://tug.ctan.org/info/biblatex-cheatsheet/biblatex-cheatsheet.pdf. Didn't change anything.
Thanks for your time!
I had a similar problem, what helped me was looking up the articles and rewriting them via the Google Scholar bibTex version.
The problem arose as I changed the name manually. This results in an error which is not recognized. And this threw me into researching exactly the same kind of .bib file not recognized error.
Your housing article should be formatted like this:
#article{hsieh2019housing,
title={Housing constraints and spatial misallocation},
author={Hsieh, Chang-Tai and Moretti, Enrico},
journal={American Economic Journal: Macroeconomics},
volume={11},
number={2},
pages={1--39},
year={2019}
}
I found another source of this problem Citavi generates invalid bibtex syntax. Often the year field is not correctly filled or special characters are not escaped properly. Maybe these are data errors which have their origin in the sources not in Citavi, but nonetheless often Citavi does not export valid bibtex format.
I use AngularJS to create a page where a user can correct a text (for example grammar, typo ... ).
I cannot use a Textarea because I want to keep trace about changes and let user rollback a correction on each word.
The following code work but it take a few seconds to render with page freeze, specialy on IE like 30 seconds), the text to correct can be very long like in the example.
I use a ng-repeat to display the text (which is an array of word). For each word I text in html if it is punctuation or a <br> or an editable word.
Is there a way to optimize this or to create in a JS way (like a compile html or anything faster)?
PLUNKER
HTML
<div ng-controller="Ctrl1">
Correct the text
<span ng-repeat="word in words track by $index">
<br ng-if="word.br"/>
<span ng-show="(!word.br)&& !word.edited">
<span ng-if="word.editable" class="correct-span" ng-click="word.edited = true">{{word.u}}</span>
<span ng-if="!word.editable">{{word.u}}</span>
</span>
<span class="my-danger" ng-show="(!word.br)&& word.edited">
<input type="text" ng-model="word.u">
<button ng-click="word.edited = false;word.u = word.o">X</button>
</span>
</span>
</div>
My controller :
var myApp = angular.module('myApp', []);
myApp.controller('Ctrl1', ['$scope', function($scope) {
function tools_isString(myVar){
return (typeof myVar == 'string' || myVar instanceof String);
}
/***
* test if object if defined
* #param object
* #returns {boolean}
*/
function tools_defined(object){
return (( typeof object !== undefined) && ( typeof object !== 'undefined') && ( object !== null ) && (object !== "")) ;
}
/**
* test if a word is in array
* #param mot : string
* #param tableau : array list
* #returns {boolean}
*/
function tools_inArray(word, array) {
if(tools_defined(array)&&tools_defined(word)) {
var length = array.length;
if (tools_isString(word)) {
word = word.toLowerCase();
}
for (var i = 0; i < length; i++) {
if (tools_isString(array[i])) {
array[i] = (array[i]).toLowerCase();
}
if (array[i] == word) return true;
}
}
return false;
}
function escapeRegExp(string) {
return string.replace(/([.*+?^=!:${}()|\[\]\/\\])/g, "\\$1");
}
function tools_replaceAll(str, find, replace) {
if(str == null ){
return null
}
return str.replace(new RegExp(escapeRegExp(find), 'g'), replace);
}
var prepareTextToCorrect = function(inputstring){
//encode new lines
inputstring = tools_replaceAll(inputstring,"<br/>","*br*");
inputstring = tools_replaceAll(inputstring,"<br>","*br*");
// unescape
inputstring = inputstring.replace(/&(lt|gt);/g, function (strMatch, p1){
return (p1 == "lt")? "<" : ">";
});
// remove all the hmtl tags
var rex = /(<([^>]+)>)|(<([^>]+)>)/ig;
inputstring = inputstring.replace(rex , "");
// re encode new lines
inputstring = tools_replaceAll(inputstring,"*br*"," <br/> ");
// separating punctuation from words
var ponctuations = [",","?",",",";",".",":","!","-","_","(",")","«","»","—"];
for(var p in ponctuations){
inputstring = tools_replaceAll(inputstring,ponctuations[p]," "+ponctuations[p]);
}
inputstring = tools_replaceAll(inputstring," "," ");
inputstring = tools_replaceAll(inputstring," "," ");
var elements = inputstring.split(" ");
var res = [];
/**
* "o" : original word
* "u" : word edited by user
* "edited" : if user edited this word
* "editable" : if the word can be edited ( ponctuation and <br> cannot )
*/
for(var i in elements){
if(elements[i].length>0) {
if(elements[i] == "<br/>") {
res.push({
"o": null, "u": null, "edited": false, "br":true
});
} else if (tools_inArray(elements[i], ponctuations)) {
res.push({
"o": elements[i], "u": elements[i], "edited": false,"editable": false , "br":false
});
}else{
res.push({
"o": elements[i], "u": elements[i], "edited": false,"editable": true , "br":false
});
}
}
}
return res ;
};
var text = "Stack Overflow is a question and answer site for professional and enthusiast programmers. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to every question about programming.<br/><br/>We're a little bit different from other sites. Here's how:<br/>Ask questions, get answers, no distractions<br/><br/>This site is all about getting answers. It's not a discussion forum. There's no chit-chat.<br/><br/>Just questions...<br/>...and answers.<br/>Good answers are voted up and rise to the top.<br/><br/>The best answers show up first so that they are always easy to find.<br/>accept<br/><br/>The person who asked can mark one answer as accepted.<br/><br/>Accepting doesn't mean it's the best answer, it just means that it worked for the person who asked.<br/>Do Swift-based applications work on OS X 10.9/iOS 7 and lower?<br/>up vote 14 down vote favorite<br/><br/>Will Swift-based applications work on OS X 10.9 (Mavericks)/iOS 7 and lower?<br/><br/>For example, I have a machine running OS X 10.8 (Mountain Lion), and I am wondering if an application I write in Swift will run on it.<br/>ios osx swift<br/>asked Jun 2 '14 at 19:25<br/>MeIr<br/>3,27752557<br/>2 Answers<br/>up vote 4 down vote accept<br/><br/>Swift code can be deployed to OS X 10.9 and iOS 7.0. It will usually crash at launch on older OS versions.<br/>answered Jun 3 '14 at 8:25<br/>Greg Parker<br/>6,21011118<br/>up vote 3 down vote<br/><br/>Apple has announced that Swift apps will be backward compatible with iOS 7 and OS X Mavericks. The WWDC app is written in Swift.<br/>answered Jun 3 '14 at 0:03<br/>Ben Gottlieb<br/>73.3k19161166<br/>Get answers to practical, detailed questions<br/><br/>Focus on questions about an actual problem you have faced. Include details about what you have tried and exactly what you are trying to do.<br/><br/>Ask about...<br/><br/>Specific programming problems<br/>Software algorithms<br/>Coding techniques<br/>Software development tools<br/><br/>Not all questions work well in our format. Avoid questions that are primarily opinion-based, or that are likely to generate discussion rather than answers.<br/><br/>Questions that need improvement may be closed until someone fixes them.<br/><br/>Don't ask about...<br/><br/>Questions you haven't tried to find an answer for (show your work!)<br/>Product or service recommendations or comparisons<br/>Requests for lists of things, polls, opinions, discussions, etc.<br/>Anything not directly related to writing computer programs<br/><br/>Tags make it easy to find interesting questions<br/><br/>Stack Overflow is a question and answer site for professional and enthusiast programmers. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to every question about programming.<br/><br/>We're a little bit different from other sites. Here's how:<br/>Ask questions, get answers, no distractions<br/><br/>This site is all about getting answers. It's not a discussion forum. There's no chit-chat.<br/><br/>Just questions...<br/>...and answers.<br/>Good answers are voted up and rise to the top.<br/><br/>The best answers show up first so that they are always easy to find.<br/>accept<br/><br/>The person who asked can mark one answer as accepted.<br/><br/>Accepting doesn't mean it's the best answer, it just means that it worked for the person who asked.<br/>Do Swift-based applications work on OS X 10.9/iOS 7 and lower?<br/>up vote 14 down vote favorite<br/><br/>Will Swift-based applications work on OS X 10.9 (Mavericks)/iOS 7 and lower?<br/><br/>For example, I have a machine running OS X 10.8 (Mountain Lion), and I am wondering if an application I write in Swift will run on it.<br/>ios osx swift<br/>asked Jun 2 '14 at 19:25<br/>MeIr<br/>3,27752557<br/>2 Answers<br/>up vote 4 down vote accept<br/><br/>Swift code can be deployed to OS X 10.9 and iOS 7.0. It will usually crash at launch on older OS versions.<br/>answered Jun 3 '14 at 8:25<br/>Greg Parker<br/>6,21011118<br/>up vote 3 down vote<br/><br/>Apple has announced that Swift apps will be backward compatible with iOS 7 and OS X Mavericks. The WWDC app is written in Swift.<br/>answered Jun 3 '14 at 0:03<br/>Ben Gottlieb<br/>73.3k19161166<br/>Get answers to practical, detailed questions<br/><br/>Focus on questions about an actual problem you have faced. Include details about what you have tried and exactly what you are trying to do.<br/><br/>Ask about...<br/><br/>Specific programming problems<br/>Software algorithms<br/>Coding techniques<br/>Software development tools<br/><br/>Not all questions work well in our format. Avoid questions that are primarily opinion-based, or that are likely to generate discussion rather than answers.<br/><br/>Questions that need improvement may be closed until someone fixes them.<br/><br/>Don't ask about...<br/><br/>Questions you haven't tried to find an answer for (show your work!)<br/>Product or service recommendations or comparisons<br/>Requests for lists of things, polls, opinions, discussions, etc.<br/>Anything not directly related to writing computer programs<br/><br/>Tags make it easy to find interesting questions<br/><br/>Stack Overflow is a question and answer site for professional and enthusiast programmers. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to every question about programming.<br/><br/>We're a little bit different from other sites. Here's how:<br/>Ask questions, get answers, no distractions<br/><br/>This site is all about getting answers. It's not a discussion forum. There's no chit-chat.<br/><br/>Just questions...<br/>...and answers.<br/>Good answers are voted up and rise to the top.<br/><br/>The best answers show up first so that they are always easy to find.<br/>accept<br/><br/>The person who asked can mark one answer as accepted.<br/><br/>Accepting doesn't mean it's the best answer, it just means that it worked for the person who asked.<br/>Do Swift-based applications work on OS X 10.9/iOS 7 and lower?<br/>up vote 14 down vote favorite<br/><br/>Will Swift-based applications work on OS X 10.9 (Mavericks)/iOS 7 and lower?<br/><br/>For example, I have a machine running OS X 10.8 (Mountain Lion), and I am wondering if an application I write in Swift will run on it.<br/>ios osx swift<br/>asked Jun 2 '14 at 19:25<br/>MeIr<br/>3,27752557<br/>2 Answers<br/>up vote 4 down vote accept<br/><br/>Swift code can be deployed to OS X 10.9 and iOS 7.0. It will usually crash at launch on older OS versions.<br/>answered Jun 3 '14 at 8:25<br/>Greg Parker<br/>6,21011118<br/>up vote 3 down vote<br/><br/>Apple has announced that Swift apps will be backward compatible with iOS 7 and OS X Mavericks. The WWDC app is written in Swift.<br/>answered Jun 3 '14 at 0:03<br/>Ben Gottlieb<br/>73.3k19161166<br/>Get answers to practical, detailed questions<br/><br/>Focus on questions about an actual problem you have faced. Include details about what you have tried and exactly what you are trying to do.<br/><br/>Ask about...<br/><br/>Specific programming problems<br/>Software algorithms<br/>Coding techniques<br/>Software development tools<br/><br/>Not all questions work well in our format. Avoid questions that are primarily opinion-based, or that are likely to generate discussion rather than answers.<br/><br/>Questions that need improvement may be closed until someone fixes them.<br/><br/>Don't ask about...<br/><br/>Questions you haven't tried to find an answer for (show your work!)<br/>Product or service recommendations or comparisons<br/>Requests for lists of things, polls, opinions, discussions, etc.<br/>Anything not directly related to writing computer programs<br/><br/>Tags make it easy to find interesting questions<br/><br/>Stack Overflow is a question and answer site for professional and enthusiast programmers. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of detailed answers to every question about programming.<br/><br/>We're a little bit different from other sites. Here's how:<br/>Ask questions, get answers, no distractions<br/><br/>This site is all about getting answers. It's not a discussion forum. There's no chit-chat.<br/><br/>Just questions...<br/>...and answers.<br/>Good answers are voted up and rise to the top.<br/><br/>The best answers show up first so that they are always easy to find.<br/>accept<br/><br/>The person who asked can mark one answer as accepted.<br/><br/>Accepting doesn't mean it's the best answer, it just means that it worked for the person who asked.<br/>Do Swift-based applications work on OS X 10.9/iOS 7 and lower?<br/>up vote 14 down vote favorite<br/><br/>Will Swift-based applications work on OS X 10.9 (Mavericks)/iOS 7 and lower?<br/><br/>For example, I have a machine running OS X 10.8 (Mountain Lion), and I am wondering if an application I write in Swift will run on it.<br/>ios osx swift<br/>asked Jun 2 '14 at 19:25<br/>MeIr<br/>3,27752557<br/>2 Answers<br/>up vote 4 down vote accept<br/><br/>Swift code can be deployed to OS X 10.9 and iOS 7.0. It will usually crash at launch on older OS versions.<br/>answered Jun 3 '14 at 8:25<br/>Greg Parker<br/>6,21011118<br/>up vote 3 down vote<br/><br/>Apple has announced that Swift apps will be backward compatible with iOS 7 and OS X Mavericks. The WWDC app is written in Swift.<br/>answered Jun 3 '14 at 0:03<br/>Ben Gottlieb<br/>73.3k19161166<br/>Get answers to practical, detailed questions<br/><br/>Focus on questions about an actual problem you have faced. Include details about what you have tried and exactly what you are trying to do.<br/><br/>Ask about...<br/><br/>Specific programming problems<br/>Software algorithms<br/>Coding techniques<br/>Software development tools<br/><br/>Not all questions work well in our format. Avoid questions that are primarily opinion-based, or that are likely to generate discussion rather than answers.<br/><br/>Questions that need improvement may be closed until someone fixes them.<br/><br/>Don't ask about...<br/><br/>Questions you haven't tried to find an answer for (show your work!)<br/>Product or service recommendations or comparisons<br/>Requests for lists of things, polls, opinions, discussions, etc.<br/>Anything not directly related to writing computer programs<br/><br/>Tags make it easy to find interesting questions<br/><br/>" ;
$scope.words = prepareTextToCorrect(text) ;
}]);
Try using ng-if instead of ng-show in your <span> tags. In such a way the browser does not need to render all the DOM nodes that you use when the word is edited. With ng-show the nodes are rendered and then hidden from the DOM using CSS. This means that the browser has to render nodes that you potentially do not use, it is highly probable that you only need to change few words and not the entire document! Try to see if this can improve the rendering time.
Whatever the front-end framework, tracking each word of a text is going to put the browser on its knees, no matter if you have V8, Turbo, 4x4 or whatever.
Just picture the number of nodes. Take a deep deep look at your DOM element, just one of your ng-if spans in your case, and imagine each one of its endless list of attributes being tracked. But you probably already know.
With angular 1.x, you can check if a textarea is $dirty on mouseup, and/or blur, and/on mousemove with a simple directive.
Just wire a service that stores any change made to the whole textarea whenever one of the above events triggers.
In short, it's going to be less expensive to store the whole textarea on every event (after all, its content is just a string, nothing too hard for a browser to handle, even if the string is big — but I'm sure you care about your users and your textarea won't end up to be massive).
To store every change made to the textarea, you can use localStorage and/or a remote DB, using possibly angular locker for localStorage abstractions, and Firebase (AngularFire), which is going to handle automagically any changes made to the textarea given you previously wire the textarea content to a Firebase object.
But your back-end could be of course any data API. I would to suggest to store a limited amount of "Ctrl/Cmd+Z" into localStorage, and for the external DB, well, it's up to you to store infinite versions. That's where Firebase would come in handy, because by forcing you to make adhere to a JSON, you can store by month, week, day, therefore accelerating your retrieval queries for when the end user wants to go back in history.
(I am not sure if this question belongs to the meta website or not, but here we go)
I want to add stackoverflow to the bibliography of a research paper I am writing, and wonder if there is any bibTeX code to do so. I already did that for gnuplot
I searched online, but in most cases the citation goes to a specific thread. In this case, I want to acknowledge SO as a whole, and add a proper citation, probably to the website itself. Hopefully somebody already did this in the past?
As an example, below are the codes I use for R and gnuplot:
#Manual{rproject,
title = {R: A Language and Environment for Statistical Computing},
author = {{R Core Team}},
organization = {R Foundation for Statistical Computing},
address = {Vienna, Austria},
year = {2015},
url = {https://www.R-project.org/},
}
#MISC{gnuplot,
author = {Thomas Williams and Colin Kelley and {many others}},
title = {Gnuplot 5.0: an interactive plotting program},
month = {June},
year = {2015},
howpublished = {\href{http://www.gnuplot.info/}{http://www.gnuplot.info/}}
}
I know that both are software, not website resources, but maybe something along those lines would work. Any feedback is appreciated!
Thanks!
I did not realize this question never got answered. The solution I found was to acknowledge the SO website in the LaTeX code with the following:
This research has made use of the online Q\&A platform {\texttt{stackoverflow}}
(\href{http://stackoverflow.com/}{http://stackoverflow.com/}).
Hope it helps somebody in the future!
Actually, for my paper I am using the following citation:
#misc{stackoverflow,
url={https://stackoverflow.com/},
title={Stack overflow},
year={2008}
}
I hope it helps!
I'm playing around with JSON-LD but I think I'm missing something about linking. Gregg Kellogg's answer to Repeat whole JSON-LD structure or only the ID? almost clears it up for me, but not quite.
He has an example like this, where the author is an organization:
{
...
"author": {
"#id" : "http://example.com",
"name": "My Organization"
}
}
Which he simplifies at the end to look like this:
{
...
"author": {"#id" : "http://example.com"}
}
It seems to me that if I wanted to link to something, I should be able to simply reference it:
{
...
"author": "http://example.com"
}
That value would be seen as an IRI (assuming author is defined correctly) and that something would inflate the object at that IRI. However, almost all of the examples I see have extra stuff around that. What am I missing here? What can't I do if I just use the IRI instead of the method Gregg uses? He says that some people repeat parts of the graph, but that would seem to be a huge problem in managing data should I have to change a name. Is there a practical or theoretical problem there?
The sample on json-ld.org seems to be what I expect, but the things I've seen most often don't do it like this (linking to spouse):
{
"#context": "http://json-ld.org/contexts/person.jsonld",
"#id": "http://dbpedia.org/resource/John_Lennon",
"name": "John Lennon",
"born": "1940-10-09",
"spouse": "http://dbpedia.org/resource/Cynthia_Lennon"
}
I think in the end if doesn't matter because Markus Lanthaler also notes that you can't rely on parsers to inflate objects so you're stuck specifying everything all the time just in case.
I have a model that looks like this:
class Report(models.Model):
updater = models.CharField(max_length=15)
pub_date = models.DateTimeField(auto_add_now=True)
identifier = models.CharField(max_length=100)
... and so on...
There are some more fields but they are irrelevant to the question. Now the site has very simple functions - the users can see older reports and their data, and can edit them or add new ones.
However, the identifier field is actually an integer that symbolizes a log file that is being reported. Most of the times, each report has one log. But sometimes it has more than one. I did it as a CharField because I built the site to replace an older sharepoint 2003 website, where that field was treated as simple text. So I want that in my next version, it would be like it should be, i.e. like this:
class Report(models.Model):
updater = models.CharField(max_length=15)
pub_date = models.DateTimeField(auto_add_now=True)
... and so on...
class Log(models.Model):
report = models.ForeignKey(Report)
identifier = models.IntegerField()
The problem is, since in the old site that field was a CharField, people used this as they liked. Meaning, even if they updated various logs in the same report they just did it like this <logid1>, <logid2>. Sometimes they added some text <logid1> which is related to <logid2>.
So I want to change this, but I don't want to lose all the old data, and I can't fix all those edge cases (the DB contains around 22 thousand reports). I thought about adding this to report:
def disp_id(self):
if self.pub_date < ... #the day I'll do the update
return self.identifier
else:
return ', '.join([log.identifier for log in self.log_set.all()])
But then I'm not really getting rid of the old field now am I? I'm just adding a new one and keeping the original null from a certain date.
As far as I know, what I want to do is impossible. I'm only asking because I know that maybe I'm not the first one to deal with this sort of thing and maybe there is a solution that I'm not aware of.
Hope my explanation is clear enough, thanks in advance!
class Report(models.Model):
updater = models.CharField(max_length=15)
pub_date = models.DateTimeField(auto_add_now=True)
identifier = models.CharField(null=True)
... and so on...
logs = models.ManyToManyField(Log,null=True)
class Log(models.Model):
identifier = models.IntegerField()
Make the above model , and then make a script as follow:
ident_list = []
for reports in Report.objects.all():
identifiers = reports.identifiers.split(',')
for idents in identifiers:
if not idents in ident_list:
log = Log.create(**{'identifier' : int(idents)})
ident_list.append(int(idents))
else:
log = Log.objects.get(identifier = int(idents))
report.log.add(log)
Check the data before removing the column identifiers from the table Report.
Does it solves your purpose now ?