MapsterMapper/Mapster

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A fast, fun and stimulating object to object Mapper

Stars: 5.2k
Forks: 410
Open beginner issues: 0
Indexed issues: 73
Avg merge: 2d 12h
Merged PRs (30d): 6

Dominant language: C#
License: MIT
Last GitHub push: Jun 12, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted good first issue

Beginner friendly Everything

Open All

73 open issues indexed

Provide more details on null reference questions Open

improvement

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

MapsterMapper/Mapster#609 · 4 comments · Opened Jul 18, 2023
Error: stack overflow when RequireExplicitMapping = true Open

bug configuration problem

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

MapsterMapper/Mapster#571 · 5 comments · 1 reaction · Opened Apr 5, 2023
Mapster.Tool interface mapping should use inheritdoc Open

feature request good first issue help wanted open for PR

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

MapsterMapper/Mapster#565 · 2 comments · Opened Mar 17, 2023
Mapster.TypeAdapterConfig Open

waiting for info

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

MapsterMapper/Mapster#556 · 2 comments · Opened Mar 1, 2023
Feature request: also force all source properties to be in destination Open

improvement open for PR

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

MapsterMapper/Mapster#551 · 1 comment · 2 reactions · Opened Feb 22, 2023
Is there going to be a [MaxDepth] attribute? Open

good first issue improvement open for PR

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

MapsterMapper/Mapster#550 · 1 comment · Opened Feb 22, 2023
Attribute based CodeGeneration RequireDestinationMemberSource propagate to dependents Open

bug

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

MapsterMapper/Mapster#541 · 1 comment · Opened Feb 13, 2023
Please support arbitrary parameters on interface when generating mapper Open

feature request

Difficulty 4/5 3-5 days Newbie friendliness 42/100

MapsterMapper/Mapster#529 · 2 comments · Opened Jan 24, 2023
Pass additional configuration settings to Mapster.Tool Open

feature request

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

MapsterMapper/Mapster#528 · 1 reaction · Opened Jan 23, 2023
Ignore nullable property does warning CS8603 Open

improvement waiting for info

Difficulty 2/5 1-3 hours Newbie friendliness 25/100

MapsterMapper/Mapster#520 · 8 comments · 2 reactions · Opened Jan 10, 2023
Mapster.JsonNet does not support Enum to string mapping Open

bug

MapsterMapper/Mapster#502 · 1 assignee · Opened Nov 30, 2022
Support XML documentation comments? Open

good first issue help wanted improvement open for PR

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

MapsterMapper/Mapster#492 · 7 comments · Opened Nov 2, 2022
[Feature Request] add api to get differents properties(or fields) when map to exists dst? Open

feature request

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

MapsterMapper/Mapster#477 · 1 comment · Opened Sep 14, 2022
Will you be adding an AssertConfigurationIsValid() equivalent? Open

feature request

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

MapsterMapper/Mapster#446 · 6 comments · 10 reactions · Opened Jun 16, 2022
Why is the list collection mapping configuration invalid Open

improvement

Difficulty 3/5 1-2 days Newbie friendliness 30/100

MapsterMapper/Mapster#439 · 1 comment · Opened May 19, 2022
[Tool][Feature request] Copy XmlDoc for generated classes Open

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

MapsterMapper/Mapster#428 · 2 comments · 1 reaction · Opened Apr 24, 2022
Generated Mapster.Tool mappers fails Dependency Injection Open

bug

MapsterMapper/Mapster#424 · 4 comments · 1 reaction · 1 assignee · Opened Apr 13, 2022
Properties do not map properly Open

bug waiting for info

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

MapsterMapper/Mapster#407 · 11 comments · Opened Feb 24, 2022
mapster tool generates non-public interface method/property implementation Open

bug help wanted

MapsterMapper/Mapster#399 · 10 comments · 1 assignee · Opened Jan 5, 2022
Feat: more powerful Attribute-based configuration Open

config features feature request

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

MapsterMapper/Mapster#360 · 2 reactions · Opened Jul 27, 2021
DateTimeOffset to DateTime throws Mapster.CompileException Open

improvement

MapsterMapper/Mapster#356 · 7 comments · 2 reactions · 1 assignee · Opened Jul 14, 2021
Tool generates empty mapper Open

bug waiting for info

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

MapsterMapper/Mapster#339 · 15 comments · 5 reactions · Opened May 17, 2021
Please use Discussions for Q&A Open

Difficulty 5/5 Over a week Newbie friendliness 10/100

MapsterMapper/Mapster#234 · Opened Mar 28, 2020

MapsterMapper/Mapster

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