So, I get this JSON from Django:
{'something' :
{'value':'somethingName','editable':'false'}
},
{'somethingElse':
{'value':'somethingElseName','editable':'true'}
}
And show it like this:
{% for key, value in obj.items %}
{{ key }} : {{ value }}
{% endfor %}
The problem is {{ value }} returns {'value':'somethingName','editable':'false'}, and I can't access value or editable trough {{ value.value }} or {{ value.editable }}.
I'd like to show {{ value.value }} as somethingName instead of the entire JSON.
Is there a way to access 'sub-level' JSON trough Django itself?
You cannot use template variable name as a dictionary key using the . notation. The second value in value.value is not interpreted as a string value because you have a variable name value in the loop.
Just rename key and value to obj_key and obj_value respectively:
{% for obj_key, obj_value in obj.items %}
{{ obj_key }} : {{ obj_value.value }}
{% endfor %}
Demo:
>>> from django.template import Context, Template
>>> t = Template("""
... {% for obj_key, obj_value in obj.items %}
... {{ obj_key }} : {{ obj_value.value }}
... {% endfor %}""")
>>> obj = {'something' : {'value':'somethingName','editable':'false'}}
>>> t.render(Context({'obj': obj}))
u'something : somethingName'
Hope that helps.
Related
I have a dictionary object. I can iterate through it using:
{% for key,val in my_dict.items() %}
String: {{ my_dict[key]['my_string'] }}<br>
Float: {{ val['my_float'] }}
{% endfor %}
This will give me something like:
String: I'm a string
Float: 0.72000001
If I try to use a method like:
{% for key,val in my_dict.items() %}
String: {{ my_dict[key]['my_string'] }}<br>
Float: {{ val['my_float']|round(2) }}
{% endfor %}
or
{% for key,val in my_dict.items() %}
String: {{ my_dict[key]['my_string'] }}<br>
Float: {{ "%.2f"|format(val['my_float']) }}
{% endfor %}
I get jinja2.exceptions.UndefinedError: 'dict object' has no attribute 'my_float'
I get a similar error when I call val['my_list'][0], even though I can see it is a list when I just use {{ val['my_list'] }} as it give me something like:
[4.91, 10.16, 19.53, 21.09, 34.27, 52.11, 9.93]
This only seems to be happening with floats and I have no idea why.
I am using jinja2 v3.0.3.
I am trying to grab the value green from the below JSON data dictionary.
The API endpoint located at http://localhost:9200/api/status give the below data:
{
"name":"prod01",
"uuid":"3430c40-e786-4325-bc48-e0a096956000",
"version":{
"number":"7.17.0",
"build_hash":"60a9838d21b6420bbdb5a4d07099111b74c68ceb",
"build_number":46534,
"build_snapshot":false
},
"status":{
"overall":{
"since":"2023-02-13T22:47:05.381Z",
"state":"green",
"title":"Green",
"nickname":"Looking good",
"icon":"success",
"uiColor":"secondary"
},
"statuses":[
{
"id":"core:elasticsearch#7.17.0",
"message":"Elasticsearch is available",
"since":"2023-02-13T22:47:05.381Z",
"state":"green",
"icon":"success",
"uiColor":"secondary"
},
{
"id":"core:savedObjects#7.17.0",
"message":"SavedObjects service has completed migrations and is available",
"since":"2023-02-13T22:47:05.381Z",
"state":"green",
"icon":"success",
"uiColor":"secondary"
}
]
}
}
And the test.sls file doing the job is:
{% set json_data = salt.cp.get_url('http://localhost:9200/api/status', dest=None) | load_json %}
{% for key, value in json_data.items() %}
{% if value['state'] == 'green' %}
{{ key }}: {{ value }} (found)
{% else %}
{{ key }}: {{ value }}
{% endif %}
{% endfor %}
Executing it, I get the error:
Rendering SLS 'base:svr.salt.dev.test' failed: Jinja variable 'str object' has no attribute 'state'
You are looping on all the key-value pairs of the object json_data, with json_data.items(), so, you do not have a my_dictionary['state'] anymore, what you have is a key which will be state and its value will be green.
This said, your {"state": "green"} is not in the root of your dictionary, so you will never find any key-value pair matching what you need.
What you can do, though is:
{% if load_json.status.overall.state == 'green' -%}
state: {{ load_json.status.overall.nickname }}
{% endif %}
Which would yield:
state: Looking good
I have a use case where I would like to define the name of a macro and then apply it to one column.
A simplified example could be as follows. I have two macros defined that I want to call dynamically in my model (both take one column as an input):
cast_to_string
convert_empty_string_to_null_value
Now, I want to call them dynamically. See the example below
{%- set macro_names = ["cast_to_string", "convert_empty_string_to_null_value"] -%}
select
{% for macro_name in macro_names %}
-- this should dynamically be evaluated to `{{ cast_to_string(my_column) }}`
-- and `{{ convert_empty_string_to_null_value(my_column) }}`
{{ macro_name(my_column) }}
{% endfor %}
from my_model
However, this will throw an error saying that a string is not callable.
I also tried using {% raw %} {{ {% endraw %} to escape brackets, but that didn’t work either.
So, my question is, if there is a way to dynamically call macros in jinja/dbt?
I think it should work if you remove the quotes :
{%- set macro_names = [cast_to_string, convert_empty_string_to_null_value] -%}
So that jinja doesn't interpret it as string and you can use it as a Callable
I achieve it using this example :
{%- set macro_names = [print_lower, print_upper] -%}
{% for macro_name in macro_names %}
{{ macro_name("test") }}
{% endfor %}
and
{% macro print_lower(string) %}
{{ print(string|lower) }}
{% endmacro %}
{% macro print_upper(string) %}
{{ print(string|upper) }}
{% endmacro %}
I'm passing a dictionary in the context in my views.py to my html template. How do I know access a value in the template based on a particular key. For instance I'd wanna do something like {{ dictionary.keyname.value }} but I don't know the correct syntax and for some reason I can't seem to find the documentation.
I want to achieve the same effect as this without having to use a for loop:
<b>Calories</b>
{% for key, value in output.items %}
{% if key == "calories" %}
{{ value }}
{% endif %}
{% endfor %}
You just want {{ output.calories }}.
Assumption - From what I understand, Liquid works in a way that the variable page.my_key can be compared to a PHP array with name page and key my_key: $page['my_key']. Following this same logic we could compare {{ page.my_key }} with echo $page['my_key'].
And we could compare this front matter:
----
my_key: my_value
----
to this PHP code:
$page['my_key'] = "my_value";
Question - I would like to do something like this:
$page['my_key'] = "my_value";
$page['my_key2'] = "my_value2";
$key = "my_key";
echo $page[$key];
All I can think of is:
----
my_key: my_value
my_key2: my_value2
----
{% assign key = 'my_key' %}
{{ page.{{ key }} }}
However, that does not work... Is something like this possible, though?
Beware : array and hash are two different animals.
Just create a array-hash.md (note I wrote it in markdown for brevity) page in your jekyll. Paste this code. And you will understand how they are different and how to access their items.
---
layout: default
title: array-hash
myArray:
- item 1
- item 2
- one more
# or
myArray2: [ item 1, item 2, one more item ]
myHash:
item1: toto
"item 2": titi
item 3: yoyo
---
{% comment %} +++ Shortcuts
a = page.myArray
h = page.MyHash
h2 = page.myArray2
{% endcomment %}
{% assign a = page.myArray %}
{% assign a2 = page.myArray2 %}
{% assign h = page.myHash %}
## Arrays
page.myArray : {{ a }}
page.myArray with inspect : {{ a | inspect }}
page.myArray with join : {{ a | join:", " }}
page.myArray2 : {{ a2 | inspect }}
### Looping the array
<ul>
{% for item in a %}
<li>{{ item | inspect }}</li>
{% endfor %}
</ul>
### Targeting a specific item in the array
{% comment %} arrays start at zero {% endcomment %}
second element in the array = {{ a[1] }}
Note that {% raw %}{{ a["1"] }}{% endraw %} will not work. You need to pass
an integer and not a string.
Test (not working) : { a["1"] }
## Hashes
page.myHash : {{ h }}
#### looping the hash
{% for item in h %}
{{ item | inspect }}
{% endfor %}
You note that in the loop we get arrays that returns **key as item[0]**
and **value as item[1]**
The loop can then look like :
<ul>
{% for item in h %}
<li>{{ item[0] }} : {{ item[1] }}</li>
{% endfor %}
</ul>
### Targeting a specific item in the hash
**Item1** due to the absence of space in the key name, can both me accessed
by dot notation (h.item1) or bracket notation (h["item1"]).
hash.item1 : {{ h.item1 }}
hash["item1"] : {{ h.["item1"] }}
Item 2 and 3, containing a space in their key string can only be accessed with
bracket notation :
hash.item 2 (not working) : {{ h.item 2 }}
hash["item 2"] : {{ h.["item 2"] }}
hash.item 3 (not working) : {{ h.item 3 }}
hash["item 3"] : {{ h.["item 3"] }}
I think I found the solution:
----
my_key: my_value
my_key2: my_value2
----
{% assign key = 'my_key' %}
{{ page[key] }}
Found it here.