Linq Return grouped result
I have the following database entity containing ingredients to put on pizza. Column Type is a foreign key to another table containing information on the ingredient category (cheese, meat, vegetables etc.)
public class Ingredient
{
public int IngredientId { get; set; }
public string Name { get; set; }
public bool IsVegetarian { get; set; }
public int Type { get; set; }
}
Some sample data:
sample ingredients
For each unique 'Type' value, I want to return a List of Ingredients with that type.
The final result will be stored in an ICollection of type IngredientViewModel.
public class IngredientViewModel : Model
{
public IngredientCategory Category { get; set; }
public List<Ingredient> Ingredients { get; set; }
}
How can I best get all ingredients, grouped per category in a single database trip using linq or lambda expressions?
I currently have the following snippet which I find a bit messy:
public async Task<IEnumerable<IngredientViewModel>> GetIngredientsPerCategoryAsync()
{
IEnumerable<Ingredient> result = await _repo.GetAllAsync();
IEnumerable<IngredientViewModel> viewModels = result.GroupBy(
x => x.Type,
(category, ingredients) => new IngredientViewModel()
{
Category = (IngredientCategory)category,
Ingredients = MapFromEntities(ingredients)
})
.OrderBy(x => x.Category.ToString())
.ToList();
return viewModels;
}
c# linq lambda
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
add a comment |
I have the following database entity containing ingredients to put on pizza. Column Type is a foreign key to another table containing information on the ingredient category (cheese, meat, vegetables etc.)
public class Ingredient
{
public int IngredientId { get; set; }
public string Name { get; set; }
public bool IsVegetarian { get; set; }
public int Type { get; set; }
}
Some sample data:
sample ingredients
For each unique 'Type' value, I want to return a List of Ingredients with that type.
The final result will be stored in an ICollection of type IngredientViewModel.
public class IngredientViewModel : Model
{
public IngredientCategory Category { get; set; }
public List<Ingredient> Ingredients { get; set; }
}
How can I best get all ingredients, grouped per category in a single database trip using linq or lambda expressions?
I currently have the following snippet which I find a bit messy:
public async Task<IEnumerable<IngredientViewModel>> GetIngredientsPerCategoryAsync()
{
IEnumerable<Ingredient> result = await _repo.GetAllAsync();
IEnumerable<IngredientViewModel> viewModels = result.GroupBy(
x => x.Type,
(category, ingredients) => new IngredientViewModel()
{
Category = (IngredientCategory)category,
Ingredients = MapFromEntities(ingredients)
})
.OrderBy(x => x.Category.ToString())
.ToList();
return viewModels;
}
c# linq lambda
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
stackoverflow.com/q/7325278
– Robert Harvey♦
Nov 25 '18 at 17:55
What have you tried you so far, and where did you get stuck?
– Yogu
Nov 25 '18 at 17:55
add a comment |
I have the following database entity containing ingredients to put on pizza. Column Type is a foreign key to another table containing information on the ingredient category (cheese, meat, vegetables etc.)
public class Ingredient
{
public int IngredientId { get; set; }
public string Name { get; set; }
public bool IsVegetarian { get; set; }
public int Type { get; set; }
}
Some sample data:
sample ingredients
For each unique 'Type' value, I want to return a List of Ingredients with that type.
The final result will be stored in an ICollection of type IngredientViewModel.
public class IngredientViewModel : Model
{
public IngredientCategory Category { get; set; }
public List<Ingredient> Ingredients { get; set; }
}
How can I best get all ingredients, grouped per category in a single database trip using linq or lambda expressions?
I currently have the following snippet which I find a bit messy:
public async Task<IEnumerable<IngredientViewModel>> GetIngredientsPerCategoryAsync()
{
IEnumerable<Ingredient> result = await _repo.GetAllAsync();
IEnumerable<IngredientViewModel> viewModels = result.GroupBy(
x => x.Type,
(category, ingredients) => new IngredientViewModel()
{
Category = (IngredientCategory)category,
Ingredients = MapFromEntities(ingredients)
})
.OrderBy(x => x.Category.ToString())
.ToList();
return viewModels;
}
c# linq lambda
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
I have the following database entity containing ingredients to put on pizza. Column Type is a foreign key to another table containing information on the ingredient category (cheese, meat, vegetables etc.)
public class Ingredient
{
public int IngredientId { get; set; }
public string Name { get; set; }
public bool IsVegetarian { get; set; }
public int Type { get; set; }
}
Some sample data:
sample ingredients
For each unique 'Type' value, I want to return a List of Ingredients with that type.
The final result will be stored in an ICollection of type IngredientViewModel.
public class IngredientViewModel : Model
{
public IngredientCategory Category { get; set; }
public List<Ingredient> Ingredients { get; set; }
}
How can I best get all ingredients, grouped per category in a single database trip using linq or lambda expressions?
I currently have the following snippet which I find a bit messy:
public async Task<IEnumerable<IngredientViewModel>> GetIngredientsPerCategoryAsync()
{
IEnumerable<Ingredient> result = await _repo.GetAllAsync();
IEnumerable<IngredientViewModel> viewModels = result.GroupBy(
x => x.Type,
(category, ingredients) => new IngredientViewModel()
{
Category = (IngredientCategory)category,
Ingredients = MapFromEntities(ingredients)
})
.OrderBy(x => x.Category.ToString())
.ToList();
return viewModels;
}
c# linq lambda
c# linq lambda
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
edited Nov 26 '18 at 16:02
Michiel Wouters
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
asked Nov 25 '18 at 17:54
Michiel WoutersMichiel Wouters
3916
3916
stackoverflow.com/q/7325278
– Robert Harvey♦
Nov 25 '18 at 17:55
What have you tried you so far, and where did you get stuck?
– Yogu
Nov 25 '18 at 17:55
add a comment |
stackoverflow.com/q/7325278
– Robert Harvey♦
Nov 25 '18 at 17:55
What have you tried you so far, and where did you get stuck?
– Yogu
Nov 25 '18 at 17:55
stackoverflow.com/q/7325278
– Robert Harvey♦
Nov 25 '18 at 17:55
stackoverflow.com/q/7325278
– Robert Harvey♦
Nov 25 '18 at 17:55
What have you tried you so far, and where did you get stuck?
– Yogu
Nov 25 '18 at 17:55
What have you tried you so far, and where did you get stuck?
– Yogu
Nov 25 '18 at 17:55
add a comment |
1 Answer
1
active
oldest
votes
The most obvious would be: Ingredients = g.ToList().
answered Nov 25 '18 at 18:39
MartyMarty
1846
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The most obvious would be: Ingredients = g.ToList().
answered Nov 25 '18 at 18:39
MartyMarty
1846
add a comment |
The most obvious would be: Ingredients = g.ToList().
answered Nov 25 '18 at 18:39
MartyMarty
1846
add a comment |
The most obvious would be: Ingredients = g.ToList().
answered Nov 25 '18 at 18:39
MartyMarty
1846
The most obvious would be: Ingredients = g.ToList().
answered Nov 25 '18 at 18:39
MartyMarty
1846
answered Nov 25 '18 at 18:39
MartyMarty
1846
answered Nov 25 '18 at 18:39
MartyMarty
1846
answered Nov 25 '18 at 18:39
MartyMarty
1846
1846
add a comment |
add a comment |
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stackoverflow.com/q/7325278
– Robert Harvey♦
Nov 25 '18 at 17:55
What have you tried you so far, and where did you get stuck?
– Yogu
Nov 25 '18 at 17:55