Draw a diagram of the data model

dm_draw() draws a diagram, a visual representation of the data model.

Usage

dm_draw(
  dm,
  rankdir = "LR",
  ...,
  col_attr = NULL,
  view_type = c("keys_only", "all", "title_only"),
  columnArrows = TRUE,
  graph_attrs = "",
  node_attrs = "",
  edge_attrs = "",
  focus = NULL,
  graph_name = "Data Model",
  column_types = NULL,
  backend = "DiagrammeR",
  font_size = NULL
)

Arguments

dm

A dm object.

rankdir

Graph attribute for direction (e.g., 'BT' = bottom –> top).

...

These dots are for future extensions and must be empty.

col_attr

Deprecated, use colummn_types instead.

view_type

Can be "keys_only" (default), "all" or "title_only". It defines the level of details for rendering tables (only primary and foreign keys, all columns, or no columns).

columnArrows

Edges from columns to columns (default: TRUE).

graph_attrs

Additional graph attributes.

node_attrs

Additional node attributes.

edge_attrs

Additional edge attributes.

focus

A list of parameters for rendering (table filter).

graph_name

The name of the graph.

column_types

Set to TRUE to show column types.

backend

Currently, only the default "DiagrammeR" is accepted. Pass this value explicitly if your code not only uses this function to display a data model but relies on the type of the return value.

font_size

Font size for:

• header, defaults to 16

• column, defaults to 16

• table_description, defaults to 8

Can be set as a named integer vector, e.g. c(table_headers = 18L, table_description = 6L).

Value

An object with a print() method, which, when printed, produces the output seen in the viewer as a side effect. Currently, this is an object of class grViz (see also DiagrammeR::grViz()), but this is subject to change.

Details

Currently, dm uses DiagrammeR to draw diagrams. Use DiagrammeRsvg::export_svg() to convert the diagram to an SVG file.

The backend for drawing the diagrams might change in the future. If you rely on DiagrammeR, pass an explicit value for the backend argument.

See also

dm_set_colors() for defining the table colors.

dm_set_table_description() for adding details to one or more tables in the diagram

Examples

dm_nycflights13() %>%
  dm_draw()

dm_nycflights13(cycle = TRUE) %>%
  dm_draw(view_type = "title_only")

head(dm_get_available_colors())
#> [1] "default"       "white"         "aliceblue"     "antiquewhite" 
#> [5] "antiquewhite1" "antiquewhite2"
length(dm_get_available_colors())
#> [1] 658

dm_nycflights13() %>%
  dm_get_colors()
#>  #ED7D31FF  #ED7D31FF  #5B9BD5FF  #ED7D31FF  #70AD47FF 
#> "airlines" "airports"  "flights"   "planes"  "weather"