Questions tagged [table]
The table tag has no usage guidance.
70 questions
0
votes
1
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141
views
Can't implement kv_table in smart contract
I'm trying to implement kv_table in my smart contract. Here is my sample code.
#include <eosio/eosio.hpp>
#include <eosio/system.hpp>
#include <eosio/time.hpp>
#include <string>...
- 21
0
votes
1
answer
426
views
Index - Constructor for must explicitly initialize the member which does not have a default constructor
I try to create two tables and mult_index, I received an error on output.
header file
#include <eosio/eosio.hpp>
#include <eosio/asset.hpp>
using namespace eosio;
CONTRACT game : public ...
- 11
1
vote
1
answer
186
views
Is it allowed to look up tables of another contract?
Imagine if I have an account with contract. Is it allowed for me to look up tables of some another contract from my contract action?
0
votes
1
answer
92
views
Traverse multi-index table through non-primary value and delete the record
Below is my smart contract:
#include <eosio/eosio.hpp>
#include <eosio/print.hpp>
#include <eosio/system.hpp>
#include <string>
using namespace eosio;
using std::string;
...
- 307
0
votes
1
answer
168
views
Tables of a smart contract: public or private?
I was wondering about the ramifications of having tables declared public. Since EOSIO is a transparent blockchain anyone can read tables of any contract. So having them declared public in a smart ...
- 144
0
votes
1
answer
428
views
Set lower bound and upper bound to get table rows
I am using eos-sharp to get table rows in ASP.NET.
By default in the table, I want to show the latest 10 records of the table. So I get them using:
GetTableRowsResponse tabledata = await eos....
- 307
0
votes
1
answer
90
views
Using a smart contract table. How can I query a row using another field instead of the primary key id?
How can I query a smart contract table to return a row instead of using the primary key id?
I have the following: https://jungle.bloks.io/account/mybest111111?loadContract=true&tab=Tables&...
- 2,257
1
vote
1
answer
127
views
How to access data inside multi-index table when using 2D vector / 2D array?
What is going on? :D I write data, but cannot find it after I write it.
The following code successfully emplaces the row into the multi-index table:
See specifically the vector<vector <...
1
vote
1
answer
187
views
how to get tables rows count in plugin
auto chain_plug = app().find_plugin<chain_plugin>();
eosio::chain_apis::read_only::get_table_by_scope_params param{N("eosio.token"), N("stat"), "EOS", "EOS&...
- 21
1
vote
1
answer
43
views
Altering userres and delband tables after set_resource_limit(-1, -1, -1)
For a private network to remove ram net cpu i set the resource limit to unlimited for each newaccount created. By chaging set_resource_limits to set_resource_limits( newact, -1, -1, -1 ); //unlimited ...
- 139
0
votes
1
answer
51
views
Wrong table name in scope response
My contract has two tables mcat and mcatmig.
Problem: scope request return wrong table name mcat........1 instead of mcatmig:
% cleos get scope teresacode
{
"rows": [{
"code": "teresacode",
"...
- 125
1
vote
1
answer
133
views
cleos data getting inserted and deleted but table shows empty record
I have written one smart contract for insert, update and delete data. The smart contract is compiled and deployed to the two accounts. I insert data using calling the action upsert, this transaction ...
- 307
0
votes
1
answer
140
views
Is it possible to add a secondary index to a table that already exists and contains entries?
If a table already exists in a smart contract on-chain and the table is full of entries, is it possible to make a secondary index for that table? Or would you have to create a new table and migrate ...
- 4,744
1
vote
0
answers
42
views
unordered map in eosio-cpp
I want to have an unordered_map inside a table so that I can have O(1) entry and retrieval. Can someone please link me to a snippet which implements that? I am new to cpp.
- 21
0
votes
1
answer
135
views
Is there way to retrieve auto incremented primary key after submission of transaction?
I'm working on sample dApp application to understand the working of multi_index table in EOS smart contract.
I have defined two multi_index table. The primary key of table1 is auto incremented using "...
- 1
0
votes
1
answer
571
views
How can we retrieve table data with secondary Index in EOS table
this is my table
struct [[eosio::table]] payment_made
{
uint64_t pay_id;
uint64_t loan_id;
uint64_t pay_amunt;
time_point_sec pay_date_req;
time_point_sec pay_date_approve;
...
0
votes
1
answer
84
views
Multi index table asks an unusual permission to emplace new row
Problem
I'm trying to emplace a new row in a multi-index table, but it tells me that I don't have the authotity of the row key name to do it.
Code
Multi-index table definition
struct [[eosio::...
0
votes
1
answer
400
views
Can we store date on eosio table?
Is there any direct datatype in eosio to store date? and if not then how can we store dates in eosio table?
void mainloan::paymentConfirm(uint64_t pay_id,uint64_t pay_date,double pay_amunt,name from ...
1
vote
0
answers
54
views
Which of the following is better for CRUD in a table?
I have two approaches to save data on blockchain, but I don't know which one is the best from time as well as space complexity perspectives. I want to store key value pairs in a table.
First Approach:...
- 111
0
votes
1
answer
37
views
what are supported STL types in tables?
What are the supported STL types in tables? I'm specifically curious about std::pair
- 115
1
vote
0
answers
53
views
Fetching More Table Rows via RPC
I have a contract with a table in it. I'm querying the contents of the table using the RPC interface, but I'm having trouble getting all the rows. To limit the memory usage of my application, I'm ...
- 1,844
1
vote
1
answer
113
views
How to delete record on EOS if I forget table structure
I issue an EOS token for fun half a year ago and I'm planning to release my EOS ram recently.
The problem is that I forget the table structure I made before and I overwrite the contract and there is ...
- 11
1
vote
1
answer
111
views
How to reclaim ram?
If a user is the authenticator when adding a row to a table, on chain, they supply the ram required to instantiate the new row.
In the case of certain tokens, mainly airdropped tokens, the contract ...
- 313
4
votes
2
answers
907
views
Get Table Rows with Pagination
How do we get records from a table by pages?
My requirement: I have a table with 100 records and want to display all these records in my front-end-application with 10 records per page and if the user ...
- 41
0
votes
1
answer
52
views
why i get "uniqueness constraint was violated" on error on empty table?
i defined a table but i made a mistake putting the fields in wrong order within EOSLIB_SERIALIZE
EOSLIB_SERIALIZE( tablename,(field1)(field4)(field3)(field2));
i did some insertions with emplace ...
- 91
2
votes
1
answer
405
views
Why does using available_primary_key() as scope for a table result in this behaviour?
Scenario:
Two tables, each using uint64_t as a primary key
Table A rows need to reference rows in Table B
Why? Relational database data duplication reasoning etc etc
Both table's primary keys are ...
- 283
0
votes
3
answers
338
views
Smart contract - find on two columns
I am currently writing a blog PoC on EOS. I would like the ability to delete a post. Now deleting by the ID alone is simple, I have it implemented as follows:
whisper::post_index posts(_code, _code....
- 131
0
votes
2
answers
383
views
Erasing records with for loops
if I want to erase a table:
orderbook b(_self, _self.value);
auto m = b.get_index<name("idxprod")>();
for (auto &i : m) {
m.erase(i);
}
I get the error:
Error 3160005: The table ...
- 515
4
votes
1
answer
359
views
How to sort a table?
I'm following this explanation https://developers.eos.io/eosio-cpp/v1.1.0/docs/multi-index-table-tutorial using v1.5.0 of the CDT. Here's what I've got:
struct [[eosio::table]] order_struct {
...
- 515
0
votes
1
answer
79
views
What is the most reliable way to sync contact account tables?
I have a contract account which has some tables. I want to watch for onchain table changes and sync them to an offline database as soon as possible. What is the most reliable way to do this? I have ...
1
vote
2
answers
62
views
Is there a way to check the histroy of a contract's table?
Is there a way to check the history after deleting the information in the table? For example, check yesterday's table information.
- 23
0
votes
1
answer
340
views
Indexing a table by asset symbol -- how to find?
suppose I declare:
struct [[eosio::table]] tst {
asset component;
uint64_t primary_key() const {
return component.symbol.code().raw();
}
};
where I mean to keep a list of assets. ...
- 515
1
vote
0
answers
31
views
tables of eosio.token are not generated in abi file
I am using "server_version_string": "v1.2.3". And I am trying to compile and customize the eosio.token contract, but the tables are accounts and currency_stats table are not generated in abi file.
How ...
- 1,366
0
votes
1
answer
275
views
Can we typecast string to use it as a id in table?
I need to use a string as a id of table in my smart contract. Initially i found some answers that string can't be use as primary key. But i use string as a key in table as given below:
//@abi table ...
- 1,366
2
votes
1
answer
106
views
Multiple Inheritance within ABI files
I have various classes that use multiple inheritance, i.e.:
class A
{
};
class B
{
};
class C : public A, public B
{
};
Single inheritance in an ABI file is possible using the base layer as ...
- 4,744
2
votes
1
answer
1k
views
scope in the get table command
What is the meaning of scope argument in the get table command?
For example, in the todo_contract, (https://developers.eos.io/eosio-cleos/reference#cleos-get-table)
we have
cleos --wallet-url http:...
- 135
1
vote
1
answer
220
views
Is it possible to have a secondary index as unique?
As per title, I'm using a key256 as a datatype for a secondary index on a multi-index table and want it to be unique. Can't find any documentation on it. TIA.
- 11
0
votes
1
answer
236
views
How can I create a table in an .hpp for a general contract? (Using the CDT)
THE STRUCTURE OF MY PROJECT
I am working in mycontract.cpp, which imports myheader.hpp
WHAT I WANT
I want to create a table in myheader.hpp, for a generic contract, "IN THEORY" as follows:
struct [...
2
votes
3
answers
1k
views
How to properly use cleos get table with --key-type sha256 / secondary index (failing on 1.4.2)
I am not able to filter a hash correctly, using get table / get_table_rows. Also I noticed that the abi is not generating a secondary index, although I am assuming this is not the problem, since ...
- 23
1
vote
1
answer
58
views
Are table lookups, like get_table_rows, included in CPU/NET resource calculation?
If a smart contract includes user data, would our smart contract be charged CPU/NET resources to do lookups on those tables, or is it only charged for transfers and actions etc.
- 113
4
votes
1
answer
115
views
BUG when two accounts send action at the same time to modify multiindex table
It took me several days to find the bug.
I got a table like this
TABLE t {uint64_t key, name player1, name player2, uint64_t status};
When the contract received the specific action, it will go ...
- 49
3
votes
2
answers
486
views
Is it possible to use a type other than uint64_t for a table primary key?
I want to use a uint128_t as a primary key in a multi_index table. Is this possible? If so, how should the ABI file be written to accomodate it?
- 4,744
1
vote
1
answer
428
views
Trying to pass a sha256 hash to my contract and store it
I'm new to the EOS platform.
For my use case I'm trying to pass a sha256 hash to a function in my contract and store it in a table which is indexed by that hash.
I've realized you can't have the ...
- 231
0
votes
1
answer
193
views
Contract Table Query Exception
As i was following eosio developers documentation
#include <eosiolib/eosio.hpp>
#include <eosiolib/print.hpp>
using namespace eosio;
using namespace std;
class addressbook : public ...
- 85
1
vote
1
answer
883
views
Assertion failure after updating a smart contract with tables
Before the update
Before the update of the code of my c++ smart contract, this uses to work absolutely fine. Data storing on the table and actions execution were done successfully.
After the update
...
1
vote
1
answer
76
views
Same name table of different contracts got merged
I wrote a contract, suppose C defining the multi-index table T. Table struct has two parameter suppose x and y. x was the primary key. I made some entries in T and when i tried to access it back, I ...
- 137
1
vote
1
answer
49
views
Can we store documents in a table.If yes, Is this a right approach?
I want to store some documents in my smart contract that some users upload.
Can I use table for storage? But second thing is table resides in RAM and this doesn't seems good to store data in Ram.
Is ...
- 1,366
5
votes
2
answers
245
views
Where should tables be created? In the contract or in each action?
In the simple blog dapp (https://github.com/EOSIO/eosio-project-demux-example) the table (for posts) was defined in the contract but is not instantiated as a field.
What are the advantages/...
- 833
2
votes
2
answers
151
views
ignore //abi table comment
I have general header, which I wanna include in different contracts:
ent.h:
//@abi table entities i64
struct entity {
entity() {};
uint64_t id;
uint64_t primary_key() const { return ...
2
votes
2
answers
514
views
How can I know if I pay ram for a row in a table?
I am creating a non-fungible token. While I own the token, I pay ram for it. After transfer of the token the new owner should pay for it. My token contract updates the payer as soon as the new owner ...
- 833