RethinkDB: iterating over object properties

rethinkdb

Solution

`map` iterates on an array or stream, not an object. You can use `keys()` to get the keys, then iterate on them.

Here's what the query looks like:

r.db("test").table("walls").getAll("wall-slug", {index: "slug"}).map(function(row) {
  return row.merge({nodes: 
    row("nodes").keys().map(function(key) {
      return r.expr([key, r.db("test").table("nodes").get(row("nodes")(key))])
    }).coerceTo("object")
  })
})

Problem

I have the following data structure: wall ``` { slug: "wall-slug", nodes: { "node1": "id-from-nodes-table-1", "node2": "id-from-nodes-table-2" } } ``` nodes ``` { id: "id-from-nodes-table-1", something: "something" } ``` Trying to merge document from nodes table into definite node in nodes object in wall table in this way: ``` r.db("test").table("walls").getAll("wall-slug", {index: "slug"}).map(function(row) { return row.merge({nodes: row("nodes").map(function(node) { return r.db("test").table("nodes").get(node); })}); }) ``` And it supposed to look like this: ``` { slug: "wall-slug", nodes: { "node1": {object from nodes table got by value from this property}, "node2": {object from nodes table got by value from this property} } } ``` But I get "Cannot convert OBJECT to SEQUENCE" message - couldn't find a way to iterate over nodes object properties and replace it's property values with objects from another table - is there any?

Original source