9 Commits (2bd3c26fb11bd3d51cdf364c78f36ba767956475)

Author	SHA1	Message	Date
James Bardin	d1d6907640	Add a provider test for a list of maps ... Interpolation of a map from a list of maps was not working. Add a provider example test to cover this.	9 years ago
James Bardin	68ba2d6ff0	ResourceConfig.get should never return (nil, true) ... Fixes a case where ResourceConfig.get inadvertently returns a nil value. Add an integration test where assigning a map to a list via interpolation would panic.	10 years ago
James Nugent	fb150ef72f	provider/test: Add test of data source count.index ... This adds a unit test to the test provider that verifies count.index behaves correctly. Although not ideal this is hard to implement as a context test without changing around the (non helper/schema) implementation of the x_data_source.	10 years ago
Paul Hinze	14cea95e86	terraform: another set of ignore_changes fixes ... This set of changes addresses two bug scenarios: (1) When an ignored change canceled a resource replacement, any downstream resources referencing computer attributes on that resource would get "diffs didn't match" errors. This happened because the `EvalDiff` implementation was calling `state.MergeDiff(diff)` on the unfiltered diff. Generally this is what you want, so that downstream references catch the "incoming" values. When there's a potential for the diff to change, thought, this results in problems w/ references. Here we solve this by doing away with the separate `EvalNode` for `ignore_changes` processing and integrating it into `EvalDiff`. This allows us to only call `MergeDiff` with the final, filtered diff. (2) When a resource had an ignored change but was still being replaced anyways, the diff was being improperly filtered. This would cause problems during apply when not all attributes were available to perform the replacement. We solve that by deferring actual attribute removal until after we've decided that we do not have to replace the resource.	10 years ago
Paul Hinze	4a1b36ac0d	core: rerun resource validation before plan and apply ... In #7170 we found two scenarios where the type checking done during the `context.Validate()` graph walk was circumvented, and the subsequent assumption of type safety in the provider's `Diff()` implementation caused panics. Both scenarios have to do with interpolations that reference Computed values. The sentinel we use to indicate that a value is Computed does not carry any type information with it yet. That means that an incorrect reference to a list or a map in a string attribute can "sneak through" validation only to crop up... 1. ...during Plan for Data Source References 2. ...during Apply for Resource references In order to address this, we: * add high-level tests for each of these two scenarios in `provider/test` * add context-level tests for the same two scenarios in `terraform` (these tests proved _really_ tricky to write!) * place an `EvalValidateResource` just before `EvalDiff` and `EvalApply` to catch these errors * add some plumbing to `Plan()` and `Apply()` to return validation errors, which were previously only generated during `Validate()` * wrap unit-tests around `EvalValidateResource` * add an `IgnoreWarnings` option to `EvalValidateResource` to prevent active warnings from halting execution on the second-pass validation Eventually, we might be able to attach type information to Computed values, which would allow for these errors to be caught earlier. For now, this solution keeps us safe from panics and raises the proper errors to the user. Fixes #7170	10 years ago
James Nugent	75ef7ab636	provider/test: Add more variants of maps ... This commit adds a binary for the test provider, and adds a variety of different types of map to the schema.	10 years ago
Paul Hinze	b4df304b47	helper/schema: Normalize bools to "true"/"false" in diffs ... For a long time now, the diff logic has relied on the behavior of `mapstructure.WeakDecode` to determine how various primitives are converted into strings. The `schema.DiffString` function is used for all primitive field types: TypeBool, TypeInt, TypeFloat, and TypeString. The `mapstructure` library's string representation of booleans is "0" and "1", which differs from `strconv.FormatBool`'s "false" and "true" (which is used in writing out boolean fields to the state). Because of this difference, diffs have long had the potential for cosmetically odd but semantically neutral output like: "true" => "1" "false" => "0" So long as `mapstructure.Decode` or `strconv.ParseBool` are used to interpret these strings, there's no functional problem. We had our first clear functional problem with #6005 and friends, where users noticed diffs like the above showing up unexpectedly and causing troubles when `ignore_changes` was in play. This particular bug occurs down in Terraform core's EvalIgnoreChanges. There, the diff is modified to account for ignored attributes, and special logic attempts to handle properly the situation where the ignored attribute was going to trigger a resource replacement. That logic relies on the string representations of the Old and New fields in the diff to be the same so that it filters properly. So therefore, we now get a bug when a diff includes `Old: "0", New: "false"` since the strings do not match, and `ignore_changes` is not properly handled. Here, we introduce `TypeBool`-specific normalizing into `finalizeDiff`. I spiked out a full `diffBool` function, but figuring out which pieces of `diffString` to duplicate there got hairy. This seemed like a simpler and more direct solution. Fixes #6005 (and potentially others!)	10 years ago
Paul Hinze	f480ae3430	core: Fix issues with ignore_changes ... The ignore_changes diff filter was stripping out attributes on Create but the diff was still making it down to the provider, so Create would end up missing attributes, causing a full failure if any required attributes were being ignored. In addition, any changes that required a replacement of the resource were causing problems with `ignore_chages`, which didn't properly filter out the replacement when the triggering attributes were filtered out. Refs #5627	10 years ago
Paul Hinze	c3e27b3e0a	provider/test: a test provider ... Here we also introduce a `test` provider meant as an aid to exposing via automated tests issues involving interactions between `helper/schema` and Terraform core. This has been helpful so far in diagnosing `ignore_changes` problems, and I imagine it will be helpful in other contexts as well. We'll have to be careful to prevent the `test` provider from becoming a dumping ground for poorly specified tests that have a clear home elsewhere. But for bug exposure I think it's useful to have.	10 years ago