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docs/concepts.md
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docs/concepts.md
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# Achitectural concepts
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Vikunja was built with a maximum flexibility in mind while developing. To achive this, I built a set of easy-to-use
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functions and respective web handlers, all represented through interfaces.
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## CRUDable
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This interface defines methods to Create/Read/ReadAll/Update/Delete something. In order to use the common web
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handler, the struct mus implement this and the rights interface.
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Each of these methods is called on an instance of a struct like so:
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```go
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func (l *List) ReadOne() (err error) {
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*l, err = GetListByID(l.ID)
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return
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}
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```
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In that case, it takes the `ID` saved in the struct instance, gets the full list object and fills the original object with it.
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(See parambinder to understand where that `ID` is coming from).
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All functions should behave like this, if they create or update something, they should return the created/updated struct
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instance. The only exception is `ReadAll()` which returns an interface. Usually this is an array, because, well you cannot
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make an array of a set type (If you know a way to do this, don't hesitate to drop me a message).
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docs/parambinder.md
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# How the binder works
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The binder binds all values inside the url to their respective fields in a struct. Those fields need to have a tag
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"param" with the name of the url placeholder which must be the same as in routes.
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Whenever one of the standard CRUD methods is invoked, this binder is called, which enables one handler method
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to handle all kinds of different urls with different parameters.
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@ -10,16 +10,6 @@ import (
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const paramTagName = "param"
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const paramTagName = "param"
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/////////////////////////
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// HOW THIS BINDER WORKS
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/////////////////////////
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// This binder binds all values inside the url to their respective fields in a struct. Those fields need to have a tag
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// "param" with the name of the url placeholder which must be the same as in routes.
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//
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// Whenever one of the standard CRUD methods is invoked, this binder is called, which enables one handler method
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// to handle all kinds of different urls with different parameters.
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/////////////////////////
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// ParamBinder binds parameters to a struct.
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// ParamBinder binds parameters to a struct.
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// Currently a working implementation, waiting to implement this officially into echo.
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// Currently a working implementation, waiting to implement this officially into echo.
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func ParamBinder(i interface{}, c echo.Context) (err error) {
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func ParamBinder(i interface{}, c echo.Context) (err error) {
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