jinja2: convert string to dict object?

Question

I have a json string stored in the database and when this is pulled out and shown on the template it is a string. I want to convert this into a dict object so I can access the contents directly.

string = "{'a':1, 'b':3}"

{{ obj }} ---> string "{'a':1, 'b':3}"

{{ obj.b }} ---> I want to access it like an object.

@bereal no I am looking for a filter to be able to convert a string into an object that I can access in the jinja template. — user299709, Mar 15 '15 at 19:37
You can use any Python expressions in Jinja or register your own filters. — bereal, Mar 15 '15 at 19:39
Why do you want to do this in your template as opposed to in the view that loads the value from the database? — dirn, Mar 16 '15 at 03:25

score 2 · Answer 1 · answered May 29 '21 at 00:45

2

obj_in_string = "{'a':1, 'b':3}"
{{ obj_in_string | tojson }}

Ref: https://jinja.palletsprojects.com/en/3.0.x/templates/#jinja-filters.tojson

answered May 29 '21 at 00:45

Suicide Bunny

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score -6 · Answer 2 · edited Apr 05 '16 at 06:32

-6

Write the following code in a temporary file and write a function back-end side:

{{ obj.b | str_to_obj }}

Put this code in your jinja filter file:

for convert str to dic object 

def str_to_obj(str):

    return eval(str)

And write this code in your admin file:

app.jinja_env.filters['str_to_obj'] = jinja_filters.str_to_obj

edited Apr 05 '16 at 06:32

Michaël Azevedo

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answered Apr 05 '16 at 05:51

Suraj

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eval() is considered bad programming practice because it allows users to dynamically execute arbitrary Python code, hence the down votes. See https://stackoverflow.com/questions/1832940 – frainfreeze Jan 18 '21 at 13:19

jinja2: convert string to dict object?

2 Answers2