uAdmin Tutorial Part 9 - Introduction to API (Current Progress)

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Structure:

• api

  • api.go
  • todo_list.go

• models

  • category.go
  • friend.go
  • item.go
  • todo.go

• main.go

• uadmin.db

  • Categories
  • Friends
  • Items
  • Todos

api

api.go

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package api

import (
    "net/http"
    "strings"
)

// Handler !
func Handler(w http.ResponseWriter, r *http.Request) {
    // r.URL.Path creates a new path called "/api/"
    r.URL.Path = strings.TrimPrefix(r.URL.Path, "/api")
    r.URL.Path = strings.TrimSuffix(r.URL.Path, "/")

    if strings.HasPrefix(r.URL.Path, "/todo_list") {
        TodoListAPIHandler(w, r)
        return
    }
}

todo_list.go

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package api

import (
    "net/http"

    // Specify the username that you used inside github.com folder
    "github.com/username/todo/models"
    "github.com/uadmin/uadmin"
)

// TodoListAPIHandler !
func TodoListAPIHandler(w http.ResponseWriter, r *http.Request) {
    // Fetch all records in the database
    todo := []models.Todo{}
    uadmin.All(&todo)

    // Accesses and fetches data from another model
    for t := range todo {
        uadmin.Preload(&todo[t])
    }

    // Return todo JSON object
    uadmin.ReturnJSON(w, r, todo)
}

models

category.go

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package models

import (
    "github.com/uadmin/uadmin"
)

// Category Model !
type Category struct {
    uadmin.Model
    Name string `uadmin:"required"`
    Icon string `uadmin:"image"`
}

friend.go

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package models

import (
    "github.com/uadmin/uadmin"
)

// Nationality Field !
type Nationality int

// Chinese !
func (Nationality) Chinese() Nationality {
    return 1
}

// Filipino !
func (Nationality) Filipino() Nationality {
    return 2
}

// Others !
func (Nationality) Others() Nationality {
    return 3
}

// Friend Model !
type Friend struct {
    uadmin.Model
    Name        string `uadmin:"required"`
    Email       string `uadmin:"email"`
    Password    string `uadmin:"password;list_exclude"`
    Nationality Nationality
    Invite      string `uadmin:"link"`
}

// Save !
func (f *Friend) Save() {
    f.Invite = "https://www.google.com/"
    uadmin.Save(f)
}

item.go

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package models

import (
    "strings"

    "github.com/uadmin/uadmin"
)

// Item Model !
type Item struct {
    uadmin.Model
    Name         string     `uadmin:"required;search;categorical_filter;filter;display_name:Product Name;default_value:Computer"`
    Description  string     `uadmin:"multilingual"`
    Category     []Category `uadmin:"list_exclude" gorm:"many2many:-"`
    CategoryList string     `uadmin:"read_only"`
    Cost         int        `uadmin:"money;pattern:^[0-9]*$;pattern_msg:Your input must be a number.;help:Input numeric characters only in this field."`
    Rating       int        `uadmin:"min:1;max:5"`
}

// Save !
func (i *Item) Save() {
    // Add a new string array type variable called categoryList
    categoryList := []string{}

    // Append every element to the categoryList array
    for c := range i.Category {
        categoryList = append(categoryList, i.Category[c].Name)
    }

    // Concatenate the categoryList to a single string separated by comma
    joinList := strings.Join(categoryList, ", ")

    // Store the joined string to the CategoryList field
    i.CategoryList = joinList

    // Save it to the database
    uadmin.Save(i)
}

todo.go

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package models

import (
    "time"

    "github.com/uadmin/uadmin"
)

// Todo Model !
type Todo struct {
    uadmin.Model
    Name        string
    Description string `uadmin:"html"`
    Category    Category
    CategoryID  uint
    Friend      Friend `uadmin:"help:Who will be a part of your activity?"`
    FriendID    uint
    Item        Item `uadmin:"help:What are the requirements needed in order to accomplish your activity?"`
    ItemID      uint
    TargetDate  time.Time
    Progress    int `uadmin:"progress_bar"`
}

main.go

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package main

import (
    "net/http"

    // Specify the username that you used inside github.com folder
    "github.com/username/todo/api"
    "github.com/username/todo/models"
    "github.com/uadmin/uadmin"
)

func main() {
    // Register Models
    uadmin.Register(
        models.Todo{},
        models.Category{},
        models.Friend{},
        models.Item{},
    )

    // Register Inlines
    uadmin.RegisterInlines(models.Category{}, map[string]string{
        "Todo": "CategoryID",
    })
    uadmin.RegisterInlines(models.Friend{}, map[string]string{
        "Todo": "FriendID",
    })
    uadmin.RegisterInlines(models.Item{}, map[string]string{
        "Todo": "ItemID",
    })

    // Call InitializeRootURL function to change the RootURL value in the Settings model.
    InitializeRootURL()

    // API Handler
    http.HandleFunc("/api/", uadmin.Handler(api.Handler))

    uadmin.StartServer()
}

func InitializeRootURL() {
    // Initialize Setting model
    setting := uadmin.Setting{}

    // Get the code
    uadmin.Get(&setting, "code = ?", "uAdmin.RootURL")

    // Assign the value as "/admin/"
    setting.ParseFormValue([]string{"/admin/"})

    // Save changes
    setting.Save()
}

uadmin.db

Categories

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Friends

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Items

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Todos

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