Missing vendors or purposes in the consent string or when using the __tcfapi() function

When using the __tcfapi() function, you will sometimes find that some vendors or purposes are missing. Generally, this is not a bug: this is due to TCF V2 functional specifications.

When you go to the preference view and make a granular choice, the function will return values at "True" or "False" for purposes. The list will be created starting from ID 1 and ending with the last vendor or purpose with a "True" value.

If this last purpose with a "True" value has an ID inferior to 10 (last purpose ID) and others have a "False" status, then the list of purpose displayed in the __tcfapi() function and the consent string will end with this last purpose with a "True" value. Following purposes with a superior ID will not show as their status would be at "False".

• For example, if you make the following choice on the preference view:

• The tcfapi() function will return the following result:

purpose: {
	consents: {
		1: true
		2: false
		3: true	
		4: true
		5: true
		6: true
		7: true
	}
	legitimateInterests: {
		1: false
		2: false
		3: true
		4: true
		5: true
		6: true
		7: true
	}
}

​

• The consent string will have the following values:

"purposeConsents": { 
	"1": true, 
	"3": true, 
	"4": true, 
	"5": true, 
	"6": true, 
	"7": true 
}, 
"purposeLegitimateInterests": { 
	"3": true, 
	"4": true, 
	"5": true, 
	"6": true, 
	"7": true 
}

• Same behavior will occur when making granular choices on the vendors' view.