hierarchy

问题 i have a model like this class Unit(models.ModelForm): Name = models.CharField(max_length = 100) Parent = models.ForeignKey('self' , on_delete=models.CASCADE , related_name = 'SubUnits') i want to show hierarchy tree with ul and li in the template. first of all in the views.py i passed all Units with no parent which considered as Root Objects and then with a custom filter tag i want to generate hierarchy ul li tree object1 ----|object 1.1 |object 1.2------| object 1.2.1 |object 1.3 objecte 2

问题 Let's say, we have a cube with dimention 'Grocery store', which has 2-level hierarchy: Fruits & Vegetables Dep. Fruits Vegetables Tomatoes Cucumbers Bakery Dep. Milk Dep. The question is - how can I add hierarchy level within mdx query of RDL-report, so that 'Tomatoes' and 'Cucumbers' members would move to the new 3rd level under native 2nd level 'Vegetables'. I need to do that without any changes to the Cube, all by means of pure mdx only. When I tried to build a calculated set for the

问题 I have list like this, myList <- lapply(unique(diamonds$cut), function(x){ lst <- lapply(unique(diamonds$color), function(y){ dta <- diamonds[diamonds$cut == x & diamonds$color == y, ] lm(price ~ carat, data = dta) }) names(lst) <- unique(diamonds$color) return(lst) }) names(myList) <- unique(diamonds$cut) The structure is, > str(myList, max.level=2) List of 5 $ Ideal :List of 7 ..$ E:List of 12 .. ..- attr(*, "class")= chr "lm" ..$ I:List of 12 .. ..- attr(*, "class")= chr "lm" ..$ J:List of

问题 we have this array from mysqli query output : $items = Array ( Array ( 'id' => 1, 'title' => 'menu1', 'parent_id' => 0 ), Array ( 'id' => 2, 'title' => 'submenu1-1', 'parent_id' => 1 ), Array ( 'id' => 3, 'title' => 'submenu1-2', 'parent_id' => 1 ), Array ( 'id' => 4, 'title' => 'menu2', 'parent_id' => 0 ), Array ( 'id' => 5, 'title' => 'submenu2-1', 'parent_id' => 4 ) ); and we need this html output with php : <ul> <li><a>menu1</a> <ul> <li><a>submenu1-1</a></li> <li><a>submenu1-2</a></li> <

问题 I have some flat data coming from the database that looks like this: List<FlatDataGroup> elements = new List<FlatDataGroup>() { new FlatDataGroup {Text = "", GroupID = 1, ParentGroupID = 0, GroupName = "Admin", UserID = 1, UserName = "John Doe"}, new FlatDataGroup {Text = "", GroupID = 1, ParentGroupID = 0, GroupName = "Admin", UserID = 2, UserName = "Jane Smith"}, new FlatDataGroup {Text = "", GroupID = 2, ParentGroupID = 1, GroupName = "Support", UserID = 3, UserName = "Johnny Support"},

问题 Suppose we have a table named SMALLER , with column num_1 and num_2 , both integer type, and some data in it. It looks like this: `num_1` `num_2` 1 2 2 3 2 8 3 4 4 5 . . . Much much much more . What Im trying to do is expand this table, and then collect all "Smaller" relations. Such that, the result table should looks like this: `num_1` `num_2` 1 2 1 3 1 4 1 5 1 8 2 3 2 4 2 5 2 8 3 4 3 5 4 5 I appreciate all helps ! Futhermore, what if instead of "smaller" relations, this table just have a

问题 I've been working for a couple of weeks on an Agda project, glibly ignoring level polymorphism as much as I can. Unfortunately (or perhaps fortunately) I seem to have reached the point where I need to start understanding it. Until now I've been using level variables only when they are needed as a second argument to Rel (or third argument to REL ). Otherwise I have omitted them, just using Set directly. Now I have some client code that explicitly quantifies over levels a and tries to pass some

问题 hoping this hasn't been asked before, but I have the following XML: <Company id="1000" name="Company1000"> <Company id="1020" name="Company1020" /> <Company id="1004" name="Company1004"> <Company id="1005" name="Company1005" /> </Company> <Company id="1022" name="Company1022" /> </Company> I have the following XPath to search for nodes: //*[contains(translate(@name, "ABCDEFGHJIKLMNOPQRSTUVWXYZ", "abcdefghijklmnopqrstuvwxyz"), "005")] I would like this to return: <Company id="1000" name=

问题 Suppose we have a table named Connected , with column node_1 and node_2 , both integer type, and some data in it. It looks like this: `node_1` `node_2` A B C D B C B F C W D N D Q . . . Much much much more . What Im trying to do is expand this table, and then collect all relations. For instance, if we can travel from 'A' to 'Q' with path 'A-B-C-D-Q' ( defined by the old table, 'A-B, B-C, C-D, D-Q'), we say that 'A' and 'Q' can be connected, and insert this pair into new table. Such that, the

问题 I have some non-heirarchal xml that has pseudo-structure. Every object declares a parent (except the "root" object) and zero or more children, but does so using ids and reference attributes rather than a nested structure. I would like to convert this to a nested structure. <document> <object id="6" children="12,15"/> <object id="12" parent="6" children="13,18"/> <object id="13" parent="12" children="14,16,17"/> <object id="14" parent="13"/> <object id="15" parent="6" children="21,22"/>