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DapperLib

3 indexed repositories · View on GitHub

Dapper
Dapper - a simple object mapper for .Net

C# · 18391 stars
DapperAOT
Build time tools in the flavor of Dapper

C# · 472 stars
Dapper.Contrib
Dapper community contributions - additional extensions for Dapper

C# · 293 stars

Beginner friendly Everything

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1.1.0 regression: a byte[] parameter member is list-expanded instead of bound as one binary parameter Open

Difficulty 3/5 1-2 days Newbie friendliness 72/100

DapperLib/DapperAOT#226 · Opened Sep 19, 2026
SQL Server sql_variant mapping regression in 2.1.86: SERVERPROPERTY Int32 to bool throws InvalidCastException Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 68/100

DapperLib/Dapper#2234 · Opened Sep 17, 2026
Dapper.AOT leaves trim-unsafe Dapper reflection paths reachable during Native AOT publish Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

DapperLib/Dapper#2232 · 1 comment · Opened Sep 14, 2026
Feature request: call-site syntax for passing CancellationToken to generated interceptor code Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

DapperLib/DapperAOT#225 · Opened Sep 14, 2026
PostgreSQL SMALLINT[] mapping fails in Dapper 2.1.86 but works in 2.1.79 Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 72/100

DapperLib/Dapper#2231 · 2 reactions · Opened Sep 13, 2026
Query<DateOnly> / Query<TimeOnly> (scalar form) silently return default(T) Open

Difficulty 3/5 1-2 days Newbie friendliness 68/100

DapperLib/Dapper#2227 · Opened Aug 20, 2026
DateOnly/DateTime coercion gaps on 'date' columns (breaks with Npgsql 10, and SqlClient the other way) Open

Difficulty 3/5 1-2 days Newbie friendliness 67/100

DapperLib/Dapper#2226 · Opened Aug 20, 2026
cmd.Cancel() in QueryRowImpl finally block causes ORA-1013 on Oracle Database Queries Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

DapperLib/Dapper#2215 · 2 comments · Opened Jun 19, 2026
Type mapper enhancements Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

DapperLib/DapperAOT#176 · Opened Jun 2, 2026
Migrate interceptor to new API Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

DapperLib/DapperAOT#175 · Opened May 16, 2026
CommandFactory does not use registered TypeHandler for parameter binding Open

Difficulty 4/5 3-5 days Newbie friendliness 55/100

DapperLib/DapperAOT#173 · 2 comments · Opened Mar 30, 2026
Proposal: Built-in extensibility for structured logging (commands, parameters, connections, transactions) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

DapperLib/Dapper#2201 · 3 comments · Opened Mar 30, 2026
Prevent analyzer for transitive dependencies Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

DapperLib/DapperAOT#170 · 1 comment · 6 reactions · Opened Mar 19, 2026
`PublishAot=true` fails because ILC still scans base Dapper.dll — proposal: AOT-annotated stubs Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

DapperLib/DapperAOT#168 · 1 comment · 2 reactions · Opened Mar 16, 2026
No QueryAsync overload which accepts CommandDefinition, for cancellation, and Type array, for unbounded map Open

Difficulty 3/5 1-2 days Newbie friendliness 48/100

DapperLib/Dapper#2193 · 1 comment · Opened Feb 22, 2026
Feature Request: Support for Open Generic TypeHandler registration Open

Difficulty 5/5 Over a week Newbie friendliness 45/100

DapperLib/Dapper#2190 · 1 comment · Opened Feb 4, 2026
QueryUnbufferedAsync cancels command unnecessarily for Npgsql, causing performance degradation Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

DapperLib/Dapper#2188 · 1 comment · Opened Jan 16, 2026
Nullable input parameter not supplied when NULL Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 38/100

DapperLib/Dapper#2187 · 3 comments · Opened Jan 8, 2026
Insert truncates all insert ids to integer size, but then converts it to a long on return: may I help fix it? Open

Difficulty 2/5 1-3 hours Newbie friendliness 42/100

DapperLib/Dapper.Contrib#174 · Opened Dec 26, 2025
Command not disposed with async using and ExecuteReaderAsync Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 50/100

DapperLib/Dapper#2185 · 1 comment · Opened Nov 13, 2025
[Question]: Unused value in the QueryAsync<T> Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

DapperLib/Dapper#2184 · 4 comments · Opened Oct 30, 2025
Literal replacements causing DAP214 Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 48/100

DapperLib/Dapper#2181 · 1 comment · Opened Sep 28, 2025
TypeHanderCache issue Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

DapperLib/DapperAOT#165 · Opened Sep 27, 2025
Possible bug: `GridReader` constructor uses `DynamicParameters` cast instead of `IParameterCallbacks` Open

bug needs-triage

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

DapperLib/Dapper#2179 · 1 comment · Opened Aug 22, 2025
How to deal with DBNull but want to go into a normal field Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

DapperLib/DapperAOT#164 · 2 comments · Opened Jul 25, 2025
Improve AI documentation to include Logging preferences Open

Difficulty 2/5 1-3 hours Newbie friendliness 38/100

DapperLib/Dapper#2176 · 1 comment · Opened Jul 24, 2025
SplitOn: support Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

DapperLib/DapperAOT#163 · 1 comment · Opened Jul 20, 2025
Add support for `QueryMultiple`, `QueryMultipleAsync` Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

DapperLib/DapperAOT#161 · 1 comment · 6 reactions · Opened Jul 17, 2025
SQLite IN clause fails in AOT mode with parameterized list (syntax error near "@Ids") Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

DapperLib/DapperAOT#160 · 6 reactions · Opened Jul 15, 2025
TypeHandler<T> not respected by DapperAOT source generator Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

DapperLib/DapperAOT#159 · 1 reaction · Opened Jul 11, 2025
Cache purge tweaking Open

Difficulty 5/5 Over a week Newbie friendliness 28/100

DapperLib/Dapper#2173 · 7 comments · Opened Jun 13, 2025
Support for dynamic SQL with variable parameters in AOT mode Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

DapperLib/DapperAOT#157 · 1 comment · 2 reactions · Opened Jun 4, 2025
Dapper TVP Behavior and SQL Server Monitoring Overhead Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

DapperLib/Dapper#2170 · 2 comments · Opened Jun 3, 2025
All nuget packages to consist of strong named dll Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

DapperLib/Dapper#2169 · 9 comments · Opened May 30, 2025
Don't report DAP037 on (other) array types Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

DapperLib/DapperAOT#156 · Opened May 26, 2025
How to obtain generated code without Visual Studio Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

DapperLib/DapperAOT#155 · Opened May 17, 2025
[Optimization] Proposal: Span-based mapping for reduced allocations Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

DapperLib/Dapper#2166 · 5 comments · Opened May 13, 2025
Using custom Dapper ITypeHandler for parsing data but cause conflict to handle SQL parameters Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 35/100

DapperLib/Dapper#2165 · Opened May 12, 2025
Proposal: Custom Deserializer Methods Open

DapperLib/Dapper#2164 · 3 comments · 1 assignee · Opened May 1, 2025
Does't support SQLite at Linux ARM64 Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 30/100

DapperLib/Dapper#2162 · 4 comments · Opened Apr 28, 2025
Proposal: add support for ILogger (Microsoft.Extensions.Logging) Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

DapperLib/Dapper#2161 · 1 comment · 2 reactions · Opened Apr 28, 2025
QueryAsync sometimes returns data for a different request than the current one Open

bug needs-triage

Difficulty 4/5 3-5 days Newbie friendliness 30/100

DapperLib/Dapper#2159 · 5 comments · Opened Apr 19, 2025
net461 has reached EOL. Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 35/100

DapperLib/Dapper#2158 · 6 comments · Opened Apr 17, 2025
DynamicParameters DbType Mapping Issues in Parameterized Queries Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

DapperLib/Dapper#2157 · Opened Apr 11, 2025
SplitOn column is needed twice in the query to work properly Open

bug needs-triage

Difficulty 3/5 1-2 days Newbie friendliness 38/100

DapperLib/Dapper#2155 · Opened Mar 30, 2025
Feature Request: Add SplitAfter parameter as alternative to SplitOn Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

DapperLib/Dapper#2154 · Opened Mar 18, 2025
DIPSAS Dapper.Oracle is Deprecated - migration path? Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

DapperLib/Dapper#2152 · 2 comments · Opened Mar 13, 2025
Insert method does not generate SQL suitable for PostgresSQL Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

DapperLib/Dapper.Contrib#173 · Opened Mar 8, 2025
Dapper currently has hardcoded values for cache eviction: Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

DapperLib/Dapper#2151 · 1 comment · Opened Mar 3, 2025
parameter in tablename Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

DapperLib/Dapper#2150 · Opened Feb 19, 2025

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