Questions tagged [persistence]
The persistence tag has no usage guidance.
4 questions
3
votes
3
answers
1k
views
How to store contract state as singleton?
What is the best way to store fields specific for contract, for example if contract has 3 fields (2 strings, 1 uint64_t) and they can be changed?
Should I create new table for this, it would always be ...
- 281
1
vote
0
answers
333
views
How do I add second and third indices to the multi_index object?
I have thoroughly read the documentation and isolated my problem down to a small set of sample code. I'm not sure where my problem is. I am trying to add multiple indices to a multi_index object so ...
- 411
8
votes
2
answers
493
views
Best practice to handle table migrations?
What is the best practice for migrating table when a member of a struct is added? For some structs, I have had no problems adding members, but for others I have. I get this error message:
$cleos get ...
- 411
2
votes
1
answer
667
views
How to allow duplicates in an eosio::multi_index object?
How do I create a struct and multi_index table that allow for duplicate records? For example, I have the below struct and multi_index table that is populated via an emplace call that selects a ...
- 411